diff --git a/webui.py b/webui.py
index a93de0c..5676dc2 100644
--- a/webui.py
+++ b/webui.py
@@ -50,18 +50,18 @@ def get_answer(query, vs_path, history, mode, score_threshold=VECTOR_SEARCH_SCOR
                     enumerate(resp["source_documents"])])
             history[-1][-1] += source
             yield history, ""
-    elif mode == "知识库问答" and vs_path is not None and os.path.exists(vs_path):
-        for resp, history in local_doc_qa.get_knowledge_based_answer(
-                query=query, vs_path=vs_path, chat_history=history, streaming=streaming):
-            source = "\n\n"
-            source += "".join(
-                [f"""<details> <summary>出处 [{i + 1}] {os.path.split(doc.metadata["source"])[-1]}</summary>\n"""
-                 f"""{doc.page_content}\n"""
-                 f"""</details>"""
-                 for i, doc in
-                 enumerate(resp["source_documents"])])
-            history[-1][-1] += source
-            yield history, ""
+    elif mode == "知识库问答" and vs_path is not None and os.path.exists(vs_path) and "index.faiss" in os.listdir(vs_path):
+            for resp, history in local_doc_qa.get_knowledge_based_answer(
+                    query=query, vs_path=vs_path, chat_history=history, streaming=streaming):
+                source = "\n\n"
+                source += "".join(
+                    [f"""<details> <summary>出处 [{i + 1}] {os.path.split(doc.metadata["source"])[-1]}</summary>\n"""
+                     f"""{doc.page_content}\n"""
+                     f"""</details>"""
+                     for i, doc in
+                     enumerate(resp["source_documents"])])
+                history[-1][-1] += source
+                yield history, ""
     elif mode == "知识库测试":
         if os.path.exists(vs_path):
             resp, prompt = local_doc_qa.get_knowledge_based_conent_test(query=query, vs_path=vs_path,
@@ -86,12 +86,11 @@ def get_answer(query, vs_path, history, mode, score_threshold=VECTOR_SEARCH_SCOR
             yield history + [[query,
                               "请选择知识库后进行测试，当前未选择知识库。"]], ""
     else:
-        for answer_result in local_doc_qa.llm.generatorAnswer(prompt=query, history=history,
+        for answer_result in local_doc_qa.llm.generatorAnswer(prompt=query, history=history[:-1],
                                                               streaming=streaming):
             resp = answer_result.llm_output["answer"]
             history = answer_result.history
-            history[-1][-1] = resp + (
-                "\n\n当前知识库为空，如需基于知识库进行问答，请先加载知识库后，再进行提问。" if mode == "知识库问答" else "")
+            history[-1][-1] = resp
             yield history, ""
     logger.info(f"flagging: username={FLAG_USER_NAME},query={query},vs_path={vs_path},mode={mode},history={history}")
     flag_csv_logger.flag([query, vs_path, history, mode], username=FLAG_USER_NAME)
@@ -169,9 +168,13 @@ def change_vs_name_input(vs_id, history):
     if vs_id == "新建知识库":
         return gr.update(visible=True), gr.update(visible=True), gr.update(visible=False), None, history
     else:
-        file_status = f"已加载知识库{vs_id}，请开始提问"
+        vs_path = os.path.join(VS_ROOT_PATH, vs_id)
+        if "index.faiss" in os.listdir(vs_path):
+            file_status = f"已加载知识库{vs_id}，请开始提问"
+        else:
+            file_status = f"已选择知识库{vs_id}，当前知识库中未上传文件，请先上传文件后，再开始提问"
         return gr.update(visible=False), gr.update(visible=False), gr.update(visible=True), \
-               os.path.join(VS_ROOT_PATH, vs_id), history + [[None, file_status]]
+               vs_path, history + [[None, file_status]]
 
 
 knowledge_base_test_mode_info = ("【注意】\n\n"