diff --git a/backend/alembic/versions/044_table_relation.py b/backend/alembic/versions/044_table_relation.py
new file mode 100644
index 000000000..9f655ed49
--- /dev/null
+++ b/backend/alembic/versions/044_table_relation.py
@@ -0,0 +1,29 @@
+"""044_table_relation
+
+Revision ID: 455b8ce69e80
+Revises: dac062c1f7b1
+Create Date: 2025-09-24 13:34:08.205659
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel.sql.sqltypes
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '455b8ce69e80'
+down_revision = 'dac062c1f7b1'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('core_datasource', sa.Column('table_relation', postgresql.JSONB(astext_type=sa.Text()), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('core_datasource', 'table_relation')
+    # ### end Alembic commands ###
diff --git a/backend/apps/api.py b/backend/apps/api.py
index 473d42b2b..8b836c0d2 100644
--- a/backend/apps/api.py
+++ b/backend/apps/api.py
@@ -1,12 +1,12 @@
 from fastapi import APIRouter
 
-from apps.terminology.api import terminology
-from apps.data_training.api import data_training
 from apps.chat.api import chat
 from apps.dashboard.api import dashboard_api
-from apps.datasource.api import datasource
-from apps.system.api import login, user, aimodel, workspace, assistant
+from apps.data_training.api import data_training
+from apps.datasource.api import datasource, table_relation
 from apps.mcp import mcp
+from apps.system.api import login, user, aimodel, workspace, assistant
+from apps.terminology.api import terminology
 
 api_router = APIRouter()
 api_router.include_router(login.router)
@@ -20,5 +20,4 @@
 api_router.include_router(chat.router)
 api_router.include_router(dashboard_api.router)
 api_router.include_router(mcp.router)
-
-
+api_router.include_router(table_relation.router)
diff --git a/backend/apps/datasource/api/table_relation.py b/backend/apps/datasource/api/table_relation.py
new file mode 100644
index 000000000..6a65060a7
--- /dev/null
+++ b/backend/apps/datasource/api/table_relation.py
@@ -0,0 +1,29 @@
+# Author: Junjun
+# Date: 2025/9/24
+from typing import List
+
+from fastapi import APIRouter
+
+from apps.datasource.models.datasource import CoreDatasource
+from common.core.deps import SessionDep
+
+router = APIRouter(tags=["table_relation"], prefix="/table_relation")
+
+
+@router.post("/save/{ds_id}")
+async def save_relation(session: SessionDep, ds_id: int, relation: List[dict]):
+    ds = session.get(CoreDatasource, ds_id)
+    if ds:
+        ds.table_relation = relation
+        session.commit()
+    else:
+        raise Exception("no datasource")
+    return True
+
+
+@router.post("/get/{ds_id}")
+async def save_relation(session: SessionDep, ds_id: int):
+    ds = session.get(CoreDatasource, ds_id)
+    if ds:
+        return ds.table_relation if ds.table_relation else []
+    return []
diff --git a/backend/apps/datasource/models/datasource.py b/backend/apps/datasource/models/datasource.py
index 56814c5c6..78f23916c 100644
--- a/backend/apps/datasource/models/datasource.py
+++ b/backend/apps/datasource/models/datasource.py
@@ -2,7 +2,8 @@
 from typing import List, Optional
 
 from pydantic import BaseModel
-from sqlalchemy import Column, Text, BigInteger, DateTime, Integer, Identity
+from sqlalchemy import Column, Text, BigInteger, DateTime, Identity
+from sqlalchemy.dialects.postgresql import JSONB
 from sqlmodel import SQLModel, Field
 
 
@@ -19,6 +20,7 @@ class CoreDatasource(SQLModel, table=True):
     status: str = Field(max_length=64, nullable=True)
     num: str = Field(max_length=256, nullable=True)
     oid: int = Field(sa_column=Column(BigInteger()))
+    table_relation: List = Field(sa_column=Column(JSONB, nullable=True))
 
 
 class CoreTable(SQLModel, table=True):