diff --git a/api/api/db/logic/process_schema.py b/api/api/db/logic/process_schema.py
index 1bc6f51..c953eb8 100644
--- a/api/api/db/logic/process_schema.py
+++ b/api/api/db/logic/process_schema.py
@@ -114,6 +114,7 @@ async def get_process_schema_page_DTO(
         limit=limit,
     )
 
+
 async def get_process_schema_by_id(connection: AsyncConnection, id: int) -> Optional[ProcessSchema]:
     """
     Получает process_schema по id.
diff --git a/api/api/db/logic/ps_node.py b/api/api/db/logic/ps_node.py
index 2aafa75..1b38b72 100644
--- a/api/api/db/logic/ps_node.py
+++ b/api/api/db/logic/ps_node.py
@@ -1,15 +1,15 @@
-from typing import Optional
+from typing import Optional, List
 
 from datetime import datetime, timezone
 
-from sqlalchemy import insert, select, desc
+from sqlalchemy import insert, select, desc, and_, or_, delete, update
 from sqlalchemy.ext.asyncio import AsyncConnection
 
-from orm.tables.process import ps_node_table
+from orm.tables.process import ps_node_table, node_link_table, process_schema_table
 
 from api.schemas.process.ps_node import Ps_Node
 from model_nodes.node_listen_models import ListenNodeCoreSchema
-from orm.tables.process import NodeStatus, NodeType
+from orm.tables.process import NodeStatus
 
 
 async def get_ps_node_by_id(connection: AsyncConnection, id: int) -> Optional[Ps_Node]:
@@ -27,21 +27,6 @@ async def get_ps_node_by_id(connection: AsyncConnection, id: int) -> Optional[Ps
     return Ps_Node.model_validate(ps_node_data)
 
 
-async def get_ps_node_by_type_and_ps_id(connection: AsyncConnection, node_type: str, ps_id: int) -> Optional[Ps_Node]:
-    """
-    Получает ps_node по node_type и ps_id.
-    """
-    query = select(ps_node_table).where(ps_node_table.c.node_type == node_type, ps_node_table.c.ps_id == ps_id)
-
-    ps_node_db_cursor = await connection.execute(query)
-
-    ps_node_data = ps_node_db_cursor.mappings().one_or_none()
-    if not ps_node_data:
-        return None
-
-    return Ps_Node.model_validate(ps_node_data)
-
-
 async def get_last_ps_node_by_creator_and_ps_id(
     connection: AsyncConnection, creator_id: int, ps_id: int
 ) -> Optional[Ps_Node]:
@@ -86,3 +71,152 @@ async def create_ps_node_schema(
     await connection.commit()
 
     return await get_last_ps_node_by_creator_and_ps_id(connection, creator_id, validated_schema.ps_id)
+
+
+async def check_node_connection(connection: AsyncConnection, node_id: int, next_node_id: int, port: int) -> bool:
+    """
+    Проверяет, подключен ли next_node_id к node_id через указанный порт.
+    """
+    query = select(node_link_table).where(
+        and_(
+            node_link_table.c.node_id == node_id,
+            node_link_table.c.next_node_id == next_node_id,
+            node_link_table.c.link_point_id == port,
+        )
+    )
+
+    result = await connection.execute(query)
+    return result.mappings().first() is not None
+
+
+async def get_all_child_nodes_with_depth(connection: AsyncConnection, node_id: int) -> List[tuple[Ps_Node, int]]:
+    """
+    Рекурсивно находит ВСЕ дочерние узлы с их уровнем вложенности.
+    """
+    all_child_nodes = []
+    visited_nodes = set()
+
+    async def find_children_with_depth(current_node_id: int, current_depth: int):
+        if current_node_id in visited_nodes:
+            return
+
+        visited_nodes.add(current_node_id)
+
+        query = (
+            select(ps_node_table)
+            .join(node_link_table, ps_node_table.c.id == node_link_table.c.next_node_id)
+            .where(node_link_table.c.node_id == current_node_id)
+        )
+
+        result = await connection.execute(query)
+        child_nodes = result.mappings().all()
+
+        for node_data in child_nodes:
+            node = Ps_Node.model_validate(node_data)
+            all_child_nodes.append((node, current_depth + 1))
+            await find_children_with_depth(node.id, current_depth + 1)
+
+    await find_children_with_depth(node_id, 0)
+    return all_child_nodes
+
+
+async def get_nodes_for_deletion_ordered(connection: AsyncConnection, node_id: int) -> List[int]:
+    """
+    Возвращает список ID узлов для удаления в правильном порядке:
+    от самых последних к первым.
+    """
+    child_nodes_with_depth = await get_all_child_nodes_with_depth(connection, node_id)
+
+    child_nodes_with_depth.sort(key=lambda x: x[1], reverse=True)
+
+    ordered_node_ids = [node.id for node, depth in child_nodes_with_depth]
+
+    ordered_node_ids.append(node_id)
+
+    return ordered_node_ids
+
+
+async def delete_ps_node_by_id_completely(connection: AsyncConnection, node_id: int) -> tuple[bool, str]:
+    """
+    Полностью удаляет узел из базы данных по ID.
+    """
+    try:
+        node_query = select(ps_node_table).where(ps_node_table.c.id == node_id)
+        node_result = await connection.execute(node_query)
+        node_data = node_result.mappings().first()
+
+        if not node_data:
+            return False, "Node not found"
+
+        ps_id = node_data["ps_id"]
+
+        await connection.execute(
+            delete(node_link_table).where(
+                or_(node_link_table.c.node_id == node_id, node_link_table.c.next_node_id == node_id)
+            )
+        )
+
+        await remove_node_from_process_schema_settings(connection, ps_id, node_id)
+
+        result = await connection.execute(delete(ps_node_table).where(ps_node_table.c.id == node_id))
+
+        if result.rowcount > 0:
+            await connection.commit()
+            return True, "Success"
+        else:
+            await connection.rollback()
+            return False, "Node not found"
+
+    except Exception as e:
+        await connection.rollback()
+        return False, str(e)
+
+
+async def delete_ps_nodes_sequentially_with_error_handling(
+    connection: AsyncConnection, node_ids: List[int]
+) -> List[int]:
+    """
+    Поочередно удаляет узлы из базы данных.
+    Возвращает список успешно удаленных ID узлов.
+    Выбрасывает исключение при первой ошибке.
+    """
+    successfully_deleted = []
+
+    for node_id in node_ids:
+        success, error_message = await delete_ps_node_by_id_completely(connection, node_id)
+        if success:
+            successfully_deleted.append(node_id)
+        else:
+            raise Exception(f"Failed to delete node {node_id}: {error_message}")
+
+    return successfully_deleted
+
+
+async def remove_node_from_process_schema_settings(connection: AsyncConnection, ps_id: int, node_id: int):
+    """
+    Удаляет ноду из поля settings в таблице process_schema.
+    """
+    from api.db.logic.process_schema import get_process_schema_by_id
+
+    process_schema = await get_process_schema_by_id(connection, ps_id)
+
+    if not process_schema or not process_schema.settings:
+        return
+
+    settings = process_schema.settings
+
+    if "nodes" in settings and isinstance(settings["nodes"], list):
+        settings["nodes"] = [
+            node_item
+            for node_item in settings["nodes"]
+            if not (
+                isinstance(node_item, dict)
+                and "node" in node_item
+                and isinstance(node_item["node"], dict)
+                and node_item["node"].get("id") == node_id
+            )
+        ]
+
+    await connection.execute(
+        update(process_schema_table).where(process_schema_table.c.id == ps_id).values(settings=settings)
+    )
diff --git a/api/api/endpoints/process_schema.py b/api/api/endpoints/process_schema.py
index dffbbba..923b0ba 100644
--- a/api/api/endpoints/process_schema.py
+++ b/api/api/endpoints/process_schema.py
@@ -146,8 +146,6 @@ async def create_processschema_endpoint(
 
     validated_start_schema = start_node.validate()
 
-    print(validated_start_schema)
-
     db_start_schema = await create_ps_node_schema(connection, validated_start_schema, user_validation.id)
 
     node = ProcessSchemaSettingsNode(
diff --git a/api/api/endpoints/ps_node.py b/api/api/endpoints/ps_node.py
index f4c750a..787497e 100644
--- a/api/api/endpoints/ps_node.py
+++ b/api/api/endpoints/ps_node.py
@@ -7,20 +7,30 @@ from api.db.logic.account import get_user_by_login
 
 from api.schemas.base import bearer_schema
 from api.schemas.process.process_schema import ProcessSchemaSettingsNodeLink, ProcessSchemaSettingsNode
-from api.schemas.process.ps_node import Ps_NodeFrontResponseNode, Ps_NodeRequest
+from api.schemas.process.ps_node import Ps_NodeFrontResponseNode, Ps_NodeRequest, Ps_NodeDeleteRequest
 from api.schemas.process.ps_node import Ps_NodeFrontResponse
 from api.services.auth import get_current_user
 
 
-from api.db.logic.ps_node import create_ps_node_schema
+from api.db.logic.ps_node import (
+    create_ps_node_schema,
+    get_ps_node_by_id,
+    check_node_connection,
+    get_nodes_for_deletion_ordered,
+    delete_ps_nodes_sequentially_with_error_handling,
+)
 from api.db.logic.node_link import get_last_link_name_by_node_id, create_node_link_schema
 
-from api.db.logic.process_schema import update_process_schema_settings_by_id
+from api.db.logic.process_schema import update_process_schema_settings_by_id, get_process_schema_by_id
+from api.services.user_role_validation import (
+    db_user_role_validation_for_list_events_and_process_schema_by_list_event_id,
+)
 
 from core import VorkNodeRegistry, VorkNodeLink
 
 from model_nodes import VorkNodeLinkData
 from api.utils.to_camel_dict import to_camel_dict
+from api.error import create_operation_error, create_access_error, create_validation_error, create_server_error
 
 
 api_router = APIRouter(
@@ -29,6 +39,78 @@ api_router = APIRouter(
 )
 
 
+@api_router.delete("", dependencies=[Depends(bearer_schema)], status_code=status.HTTP_200_OK)
+async def delete_ps_node_endpoint(
+    ps_node_delete_data: Ps_NodeDeleteRequest,
+    connection: AsyncConnection = Depends(get_connection_dep),
+    current_user=Depends(get_current_user),
+):
+    process_schema = await get_process_schema_by_id(connection, ps_node_delete_data.schema_id)
+    if process_schema is None:
+        raise create_operation_error(
+            message="Process schema not found",
+            status_code=status.HTTP_404_NOT_FOUND,
+            details={"schema_id": ps_node_delete_data.schema_id},
+        )
+
+    try:
+        await db_user_role_validation_for_list_events_and_process_schema_by_list_event_id(
+            connection, current_user, process_schema.creator_id
+        )
+    except Exception as e:
+        raise create_access_error(
+            message="Access denied",
+            status_code=status.HTTP_403_FORBIDDEN,
+            details={"user_id": current_user, "schema_creator_id": process_schema.creator_id, "reason": str(e)},
+        )
+
+    ps_node = await get_ps_node_by_id(connection, ps_node_delete_data.node_id)
+    if ps_node is None:
+        raise create_operation_error(
+            message="PS node not found",
+            status_code=status.HTTP_404_NOT_FOUND,
+            details={"node_id": ps_node_delete_data.node_id},
+        )
+
+    next_ps_node = await get_ps_node_by_id(connection, ps_node_delete_data.next_node_id)
+    if next_ps_node is None:
+        raise create_operation_error(
+            message="Next PS node not found",
+            status_code=status.HTTP_400_BAD_REQUEST,
+            details={"next_node_id": ps_node_delete_data.next_node_id},
+        )
+
+    is_connected = await check_node_connection(
+        connection, ps_node_delete_data.node_id, ps_node_delete_data.next_node_id, int(ps_node_delete_data.port)
+    )
+
+    if not is_connected:
+        raise create_validation_error(
+            message="Node connection validation failed",
+            status_code=status.HTTP_400_BAD_REQUEST,
+            details={
+                "node_id": ps_node_delete_data.node_id,
+                "next_node_id": ps_node_delete_data.next_node_id,
+                "port": ps_node_delete_data.port,
+            },
+        )
+
+    ordered_node_ids = await get_nodes_for_deletion_ordered(connection, ps_node_delete_data.next_node_id)
+
+    try:
+        deleted_node_ids = await delete_ps_nodes_sequentially_with_error_handling(connection, ordered_node_ids)
+    except Exception as e:
+        raise create_server_error(
+            message="Failed to delete nodes",
+            status_code=500,
+            details={"error": str(e), "ordered_node_ids": ordered_node_ids},
+        )
+
+    return {
+        "deleted_node_ids": deleted_node_ids,
+    }
+
+
 @api_router.post("", dependencies=[Depends(bearer_schema)], response_model=Ps_NodeFrontResponse)
 async def create_ps_node_endpoint(
     ps_node: Ps_NodeRequest,
@@ -37,6 +119,10 @@ async def create_ps_node_endpoint(
 ):
     user_validation = await get_user_by_login(connection, current_user)
 
+    process_schema = await get_process_schema_by_id(connection, ps_node.data["ps_id"])
+    if process_schema is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Process schema not found")
+
     registery = VorkNodeRegistry()
 
     vork_node = registery.get(ps_node.data["node_type"])
diff --git a/api/api/error/__init__.py b/api/api/error/__init__.py
new file mode 100644
index 0000000..c19a55f
--- /dev/null
+++ b/api/api/error/__init__.py
@@ -0,0 +1,26 @@
+"""
+Модуль для обработки ошибок API.
+"""
+
+from .error_model.error_types import ServerError, AccessError, OperationError, ValidationError, ErrorType
+
+from .error_handlers import (
+    handle_api_error,
+    create_server_error,
+    create_access_error,
+    create_operation_error,
+    create_validation_error,
+)
+
+__all__ = [
+    "ServerError",
+    "AccessError",
+    "OperationError",
+    "ValidationError",
+    "ErrorType",
+    "handle_api_error",
+    "create_server_error",
+    "create_access_error",
+    "create_operation_error",
+    "create_validation_error",
+]
diff --git a/api/api/error/error_handlers.py b/api/api/error/error_handlers.py
new file mode 100644
index 0000000..a298559
--- /dev/null
+++ b/api/api/error/error_handlers.py
@@ -0,0 +1,54 @@
+"""
+Обработчики ошибок для API.
+"""
+
+from typing import Optional, Dict, Any
+from fastapi import HTTPException
+
+from .error_model.error_types import ServerError, AccessError, OperationError, ValidationError, ErrorType
+
+
+def handle_api_error(
+    error_type: ErrorType, message: str, status_code: int, details: Optional[Dict[str, Any]] = None
+) -> HTTPException:
+    """
+    Функция для создания HTTPException с правильной структурой ошибки.
+
+    """
+    match error_type:
+        case ErrorType.SERVER:
+            error = ServerError(message=message, details=details)
+        case ErrorType.ACCESS:
+            error = AccessError(message=message, details=details)
+        case ErrorType.OPERATION:
+            error = OperationError(message=message, details=details)
+        case ErrorType.VALIDATION:
+            error = ValidationError(message=message, details=details)
+        case _:
+            error = ServerError(message=message, details=details)
+
+    return HTTPException(status_code=status_code, detail=error.model_dump(mode="json"))
+
+
+def create_server_error(
+    message: str, status_code: int = 500, details: Optional[Dict[str, Any]] = None
+) -> HTTPException:
+    return handle_api_error(error_type=ErrorType.SERVER, message=message, status_code=status_code, details=details)
+
+
+def create_access_error(
+    message: str, status_code: int = 403, details: Optional[Dict[str, Any]] = None
+) -> HTTPException:
+    return handle_api_error(error_type=ErrorType.ACCESS, message=message, status_code=status_code, details=details)
+
+
+def create_operation_error(
+    message: str, status_code: int = 400, details: Optional[Dict[str, Any]] = None
+) -> HTTPException:
+    return handle_api_error(error_type=ErrorType.OPERATION, message=message, status_code=status_code, details=details)
+
+
+def create_validation_error(
+    message: str, status_code: int = 400, details: Optional[Dict[str, Any]] = None
+) -> HTTPException:
+    return handle_api_error(error_type=ErrorType.VALIDATION, message=message, status_code=status_code, details=details)
diff --git a/api/api/error/error_model/__init__.py b/api/api/error/error_model/__init__.py
new file mode 100644
index 0000000..b9070d1
--- /dev/null
+++ b/api/api/error/error_model/__init__.py
@@ -0,0 +1,7 @@
+"""
+Модели ошибок для API.
+"""
+
+from .error_types import ServerError, AccessError, OperationError, ValidationError, ErrorType
+
+__all__ = ["ServerError", "AccessError", "OperationError", "ValidationError", "ErrorType"]
diff --git a/api/api/error/error_model/error_types.py b/api/api/error/error_model/error_types.py
new file mode 100644
index 0000000..92c9bb2
--- /dev/null
+++ b/api/api/error/error_model/error_types.py
@@ -0,0 +1,56 @@
+"""
+Типизированные модели ошибок для API.
+"""
+
+from enum import Enum
+from typing import Optional, Dict, Any
+from pydantic import BaseModel
+
+
+class ErrorType(str, Enum):
+    """
+    Типы ошибок API.
+    """
+
+    SERVER = "SERVER"
+    ACCESS = "ACCESS"
+    OPERATION = "OPERATION"
+    VALIDATION = "VALIDATION"
+
+
+class BaseError(BaseModel):
+    """
+    Базовая модель ошибки.
+    """
+    error_type: ErrorType
+    message: str
+    details: Optional[Dict[str, Any]] = None
+
+
+class ServerError(BaseError):
+    """
+    Критические серверные ошибки (БД, соединения и прочие неприятности).
+    """
+    error_type: ErrorType = ErrorType.SERVER
+
+
+class AccessError(BaseError):
+    """
+    Ошибки доступа (несоответствие тенантности, ролям доступа).
+    """
+    error_type: ErrorType = ErrorType.ACCESS
+
+
+class OperationError(BaseError):
+    """
+    Ошибки операции (несоответствие прохождению верификации, ошибки в датасете).
+    """
+    error_type: ErrorType = ErrorType.OPERATION
+
+
+class ValidationError(BaseError):
+    """
+    Ошибки валидации (несоответствие первичной валидации).
+    """
+    error_type: ErrorType = ErrorType.VALIDATION
+    field_errors: Optional[Dict[str, str]] = None
diff --git a/api/api/schemas/process/ps_node.py b/api/api/schemas/process/ps_node.py
index 5d75a1a..49d7bb3 100644
--- a/api/api/schemas/process/ps_node.py
+++ b/api/api/schemas/process/ps_node.py
@@ -6,6 +6,13 @@ from orm.tables.process import NodeStatus, NodeType
 from api.schemas.base import Base
 
 
+class Ps_NodeDeleteRequest(Base):
+    schema_id: int
+    node_id: int
+    port: str
+    next_node_id: int
+
+
 class Ps_NodeRequest(Base):
     data: Dict[str, Any]
     links: Dict[str, Any]