diff --git a/assets/test_case.zip b/assets/test_case.zip
new file mode 100644
index 0000000..c765e54
Binary files /dev/null and b/assets/test_case.zip differ
diff --git a/utils/actions/fundus_diagnosis.py b/utils/actions/fundus_diagnosis.py
index e5d5f1d..6790ab5 100644
--- a/utils/actions/fundus_diagnosis.py
+++ b/utils/actions/fundus_diagnosis.py
@@ -47,7 +47,13 @@ def __call__(self, query: str) -> ActionReturn:
         logger.info("query: " + query)
         if query.startswith("{"):
             query = query.replace("'", "\"")  # 为了解决如下错误：{'image_path':'static/lwh017-20180821-OD-1.jpg'}
-            query = json.loads(query)
+            try:
+                query = json.loads(query)
+            except:
+                t = ActionReturn(url=None, args=None, type=self.name, )
+                t.result = "输入参数格式参数，输入需要为str:image_path"
+                t.state = ActionStatusCode.API_ERROR
+                return t
             if not (isinstance(query, dict) and ("image_path" in query or "value" in query)):
                 response = "输入参数错误，请确定是否需要调用该工具"
                 tool_return = ActionReturn(url=None, args=None, type=self.name)
diff --git a/web_demo.py b/web_demo.py
index 525e49b..9ad9d2d 100644
--- a/web_demo.py
+++ b/web_demo.py
@@ -117,6 +117,7 @@ def setup_sidebar(self):
             st.session_state.file_upload_key = 0
         uploaded_file = st.sidebar.file_uploader(
             '眼底图文件', type=['png', 'jpg', 'jpeg'], key=st.session_state.file_upload_key)
+        st.sidebar.download_button(label="下载眼底图测试用例", data=open("assets/test_case.zip", "rb").read(), file_name="test_case.zip", mime="application/zip")
         return model_name, model, plugin_action, uploaded_file
 
     def init_model(self, option):