diff --git a/api/apps/restful_apis/chunk_api.py b/api/apps/restful_apis/chunk_api.py
index 049ed60e04..e5a78cdf96 100644
--- a/api/apps/restful_apis/chunk_api.py
+++ b/api/apps/restful_apis/chunk_api.py
@@ -105,6 +105,7 @@ class Chunk(BaseModel):
     questions: list = Field(default_factory=list)
     question_tks: str = ""
     image_id: str = ""
+    doc_type_kwd: str = ""
     available: bool = True
     positions: list[list[int]] = Field(default_factory=list)
 
@@ -489,6 +490,7 @@ async def list_chunks(tenant_id, dataset_id, document_id):
             "questions": chunk.get("question_kwd", []),
             "dataset_id": chunk.get("kb_id", chunk.get("dataset_id")),
             "image_id": chunk.get("img_id", ""),
+            "doc_type_kwd": chunk.get("doc_type_kwd") if isinstance(chunk.get("doc_type_kwd"), str) else "text",
             "available": bool(chunk.get("available_int", 1)),
             "positions": chunk.get("position_int", []),
             "tag_kwd": chunk.get("tag_kwd", []),
@@ -516,6 +518,7 @@ async def list_chunks(tenant_id, dataset_id, document_id):
                 "questions": sres.field[chunk_id].get("question_kwd", []),
                 "dataset_id": sres.field[chunk_id].get("kb_id", sres.field[chunk_id].get("dataset_id")),
                 "image_id": sres.field[chunk_id].get("img_id", ""),
+                "doc_type_kwd": sres.field[chunk_id].get("doc_type_kwd") if isinstance(sres.field[chunk_id].get("doc_type_kwd"), str) else "text",
                 "available": bool(int(sres.field[chunk_id].get("available_int", "1"))),
                 "positions": sres.field[chunk_id].get("position_int", []),
             }
@@ -969,6 +972,7 @@ async def add_chunk(tenant_id, dataset_id, document_id):
         "id": chunk_id,
         "content_ltks": rag_tokenizer.tokenize(req["content"]),
         "content_with_weight": req["content"],
+        "doc_type_kwd": "text",
     }
     d["content_sm_ltks"] = rag_tokenizer.fine_grained_tokenize(d["content_ltks"])
     d["important_kwd"] = req.get("important_keywords", [])
@@ -1024,6 +1028,7 @@ async def add_chunk(tenant_id, dataset_id, document_id):
         "create_time": "create_time",
         "document_keyword": "document",
         "img_id": "image_id",
+        "doc_type_kwd": "doc_type_kwd",
     }
     renamed_chunk = {new_key: d[key] for key, new_key in key_mapping.items() if key in d}
     _ = Chunk(**renamed_chunk)
diff --git a/test/testcases/test_web_api/test_chunk_app/test_chunk_routes_unit.py b/test/testcases/test_web_api/test_chunk_app/test_chunk_routes_unit.py
index 5a2f2aee4b..3708c76d43 100644
--- a/test/testcases/test_web_api/test_chunk_app/test_chunk_routes_unit.py
+++ b/test/testcases/test_web_api/test_chunk_app/test_chunk_routes_unit.py
@@ -521,6 +521,13 @@ def test_restful_chunk_list_get_and_delete_unit(monkeypatch):
     assert res["data"]["total"] == 1, res
     assert res["data"]["chunks"][0]["id"] == "chunk-1", res
     assert res["data"]["chunks"][0]["available"] is True, res
+    assert res["data"]["chunks"][0]["doc_type_kwd"] == "text", res
+
+    module.request = SimpleNamespace(args={"id": "chunk-1"}, headers={})
+    module.settings.docStoreConn.chunk["doc_type_kwd"] = "image"
+    res = _run(_route_core(module.list_chunks)("tenant-1", "kb-1", "doc-1"))
+    assert res["code"] == 0, res
+    assert res["data"]["chunks"][0]["doc_type_kwd"] == "image", res
 
     res = _run(_route_core(module.get_chunk)("tenant-1", "kb-1", "doc-1", "chunk-1"))
     assert res["code"] == 0, res
@@ -715,3 +722,4 @@ def test_restful_add_chunk_valid_image_base64_stores_before_insert(monkeypatch):
     inserted = module.settings.docStoreConn.inserted[-1]
     assert inserted.get("img_id"), inserted
     assert inserted.get("doc_type_kwd") == "image", inserted
+    assert res["data"]["chunk"]["doc_type_kwd"] == "image", res