diff --git a/src/chat/chat_loop/heartFC_chat.py b/src/chat/chat_loop/heartFC_chat.py
index 6efcd6cb1..745d4f78a 100644
--- a/src/chat/chat_loop/heartFC_chat.py
+++ b/src/chat/chat_loop/heartFC_chat.py
@@ -291,6 +291,9 @@ class HeartFChatting:
             total_interest = 0.0
             for msg_dict in new_message:
                 interest_value = msg_dict.get("interest_value", 0.0)
+                # 确保 interest_value 不为 None
+                if interest_value is None:
+                    interest_value = 0.0
                 if msg_dict.get("processed_plain_text", ""):
                     total_interest += interest_value
             
@@ -308,6 +311,9 @@ class HeartFChatting:
             for msg_dict in new_message:
                 text = msg_dict.get("processed_plain_text", "")
                 interest_value = msg_dict.get("interest_value", 0.0)
+                # 确保 interest_value 不为 None
+                if interest_value is None:
+                    interest_value = 0.0
                 if text:
                     accumulated_interest += interest_value
             
diff --git a/src/chat/message_receive/message.py b/src/chat/message_receive/message.py
index 4919decd4..75bb305f2 100644
--- a/src/chat/message_receive/message.py
+++ b/src/chat/message_receive/message.py
@@ -117,7 +117,7 @@ class MessageRecv(Message):
 
         self.priority_mode = "interest"
         self.priority_info = None
-        self.interest_value: float = None  # type: ignore
+        self.interest_value: float = 0.0
 
     def update_chat_stream(self, chat_stream: "ChatStream"):
         self.chat_stream = chat_stream