diff --git a/api/core/rag/datasource/vdb/baidu/baidu_vector.py b/api/core/rag/datasource/vdb/baidu/baidu_vector.py
index 2b220fc04d..99ab0d82f2 100644
--- a/api/core/rag/datasource/vdb/baidu/baidu_vector.py
+++ b/api/core/rag/datasource/vdb/baidu/baidu_vector.py
@@ -30,7 +30,7 @@ from pymochow.model.table import AnnSearch, BM25SearchRequest, HNSWSearchParams,
 from configs import dify_config
 from core.rag.datasource.vdb.field import Field as VDBField
 from core.rag.datasource.vdb.field import parse_metadata_json
-from core.rag.datasource.vdb.vector_base import BaseVector
+from core.rag.datasource.vdb.vector_base import BaseVector, VectorIndexStructDict
 from core.rag.datasource.vdb.vector_factory import AbstractVectorFactory
 from core.rag.datasource.vdb.vector_type import VectorType
 from core.rag.embedding.embedding_base import Embeddings
@@ -85,8 +85,12 @@ class BaiduVector(BaseVector):
     def get_type(self) -> str:
         return VectorType.BAIDU
 
-    def to_index_struct(self):
-        return {"type": self.get_type(), "vector_store": {"class_prefix": self._collection_name}}
+    def to_index_struct(self) -> VectorIndexStructDict:
+        result: VectorIndexStructDict = {
+            "type": self.get_type(),
+            "vector_store": {"class_prefix": self._collection_name},
+        }
+        return result
 
     def create(self, texts: list[Document], embeddings: list[list[float]], **kwargs):
         self._create_table(len(embeddings[0]))
diff --git a/api/core/rag/datasource/vdb/qdrant/qdrant_vector.py b/api/core/rag/datasource/vdb/qdrant/qdrant_vector.py
index a9f946dd43..f4fcb975c3 100644
--- a/api/core/rag/datasource/vdb/qdrant/qdrant_vector.py
+++ b/api/core/rag/datasource/vdb/qdrant/qdrant_vector.py
@@ -22,7 +22,7 @@ from sqlalchemy import select
 
 from configs import dify_config
 from core.rag.datasource.vdb.field import Field
-from core.rag.datasource.vdb.vector_base import BaseVector
+from core.rag.datasource.vdb.vector_base import BaseVector, VectorIndexStructDict
 from core.rag.datasource.vdb.vector_factory import AbstractVectorFactory
 from core.rag.datasource.vdb.vector_type import VectorType
 from core.rag.embedding.embedding_base import Embeddings
@@ -94,8 +94,12 @@ class QdrantVector(BaseVector):
     def get_type(self) -> str:
         return VectorType.QDRANT
 
-    def to_index_struct(self):
-        return {"type": self.get_type(), "vector_store": {"class_prefix": self._collection_name}}
+    def to_index_struct(self) -> VectorIndexStructDict:
+        result: VectorIndexStructDict = {
+            "type": self.get_type(),
+            "vector_store": {"class_prefix": self._collection_name},
+        }
+        return result
 
     def create(self, texts: list[Document], embeddings: list[list[float]], **kwargs):
         if texts:
diff --git a/api/core/rag/datasource/vdb/tencent/tencent_vector.py b/api/core/rag/datasource/vdb/tencent/tencent_vector.py
index 829db9db20..c6836d9cf9 100644
--- a/api/core/rag/datasource/vdb/tencent/tencent_vector.py
+++ b/api/core/rag/datasource/vdb/tencent/tencent_vector.py
@@ -12,7 +12,7 @@ from tcvectordb.model.document import AnnSearch, Filter, KeywordSearch, Weighted
 
 from configs import dify_config
 from core.rag.datasource.vdb.field import parse_metadata_json
-from core.rag.datasource.vdb.vector_base import BaseVector
+from core.rag.datasource.vdb.vector_base import BaseVector, VectorIndexStructDict
 from core.rag.datasource.vdb.vector_factory import AbstractVectorFactory
 from core.rag.datasource.vdb.vector_type import VectorType
 from core.rag.embedding.embedding_base import Embeddings
@@ -83,8 +83,12 @@ class TencentVector(BaseVector):
     def get_type(self) -> str:
         return VectorType.TENCENT
 
-    def to_index_struct(self):
-        return {"type": self.get_type(), "vector_store": {"class_prefix": self._collection_name}}
+    def to_index_struct(self) -> VectorIndexStructDict:
+        result: VectorIndexStructDict = {
+            "type": self.get_type(),
+            "vector_store": {"class_prefix": self._collection_name},
+        }
+        return result
 
     def _has_collection(self) -> bool:
         return bool(
diff --git a/api/core/rag/datasource/vdb/tidb_on_qdrant/tidb_on_qdrant_vector.py b/api/core/rag/datasource/vdb/tidb_on_qdrant/tidb_on_qdrant_vector.py
index 499a48ac76..605cc5a08f 100644
--- a/api/core/rag/datasource/vdb/tidb_on_qdrant/tidb_on_qdrant_vector.py
+++ b/api/core/rag/datasource/vdb/tidb_on_qdrant/tidb_on_qdrant_vector.py
@@ -25,7 +25,7 @@ from sqlalchemy import select
 from configs import dify_config
 from core.rag.datasource.vdb.field import Field
 from core.rag.datasource.vdb.tidb_on_qdrant.tidb_service import TidbService
-from core.rag.datasource.vdb.vector_base import BaseVector
+from core.rag.datasource.vdb.vector_base import BaseVector, VectorIndexStructDict
 from core.rag.datasource.vdb.vector_factory import AbstractVectorFactory
 from core.rag.datasource.vdb.vector_type import VectorType
 from core.rag.embedding.embedding_base import Embeddings
@@ -91,8 +91,12 @@ class TidbOnQdrantVector(BaseVector):
     def get_type(self) -> str:
         return VectorType.TIDB_ON_QDRANT
 
-    def to_index_struct(self):
-        return {"type": self.get_type(), "vector_store": {"class_prefix": self._collection_name}}
+    def to_index_struct(self) -> VectorIndexStructDict:
+        result: VectorIndexStructDict = {
+            "type": self.get_type(),
+            "vector_store": {"class_prefix": self._collection_name},
+        }
+        return result
 
     def create(self, texts: list[Document], embeddings: list[list[float]], **kwargs):
         if texts:
diff --git a/api/core/rag/datasource/vdb/vector_base.py b/api/core/rag/datasource/vdb/vector_base.py
index f29b270e40..6fbd802a10 100644
--- a/api/core/rag/datasource/vdb/vector_base.py
+++ b/api/core/rag/datasource/vdb/vector_base.py
@@ -1,11 +1,20 @@
 from __future__ import annotations
 
 from abc import ABC, abstractmethod
-from typing import Any
+from typing import Any, TypedDict
 
 from core.rag.models.document import Document
 
 
+class VectorStoreDict(TypedDict):
+    class_prefix: str
+
+
+class VectorIndexStructDict(TypedDict):
+    type: str
+    vector_store: VectorStoreDict
+
+
 class BaseVector(ABC):
     def __init__(self, collection_name: str):
         self._collection_name = collection_name
diff --git a/api/core/rag/datasource/vdb/weaviate/weaviate_vector.py b/api/core/rag/datasource/vdb/weaviate/weaviate_vector.py
index d29d62c93f..25b65b82a9 100644
--- a/api/core/rag/datasource/vdb/weaviate/weaviate_vector.py
+++ b/api/core/rag/datasource/vdb/weaviate/weaviate_vector.py
@@ -24,7 +24,7 @@ from weaviate.exceptions import UnexpectedStatusCodeError
 
 from configs import dify_config
 from core.rag.datasource.vdb.field import Field
-from core.rag.datasource.vdb.vector_base import BaseVector
+from core.rag.datasource.vdb.vector_base import BaseVector, VectorIndexStructDict
 from core.rag.datasource.vdb.vector_factory import AbstractVectorFactory
 from core.rag.datasource.vdb.vector_type import VectorType
 from core.rag.embedding.embedding_base import Embeddings
@@ -184,9 +184,13 @@ class WeaviateVector(BaseVector):
         dataset_id = dataset.id
         return Dataset.gen_collection_name_by_id(dataset_id)
 
-    def to_index_struct(self) -> dict:
+    def to_index_struct(self) -> VectorIndexStructDict:
         """Returns the index structure dictionary for persistence."""
-        return {"type": self.get_type(), "vector_store": {"class_prefix": self._collection_name}}
+        result: VectorIndexStructDict = {
+            "type": self.get_type(),
+            "vector_store": {"class_prefix": self._collection_name},
+        }
+        return result
 
     def create(self, texts: list[Document], embeddings: list[list[float]], **kwargs):
         """