diff --git a/src/channels/feishu.rs b/src/channels/feishu.rs
index b008b23..e328b5f 100644
--- a/src/channels/feishu.rs
+++ b/src/channels/feishu.rs
@@ -1620,6 +1620,15 @@ impl Default for MdPatterns {
 }
 
 impl FeishuChannel {
+    fn strip_thinking_tags(content: &str) -> String {
+        use std::sync::LazyLock;
+        static THINK_RE: LazyLock<Regex> = LazyLock::new(|| {
+            Regex::new(r"(?s)<think>.*?</think>").unwrap()
+        });
+        let stripped = THINK_RE.replace_all(content, "");
+        stripped.trim().to_string()
+    }
+
     /// Determine the optimal Feishu message format for content.
     fn detect_msg_format(content: &str) -> MsgFormat {
         let patterns = MdPatterns::new();
@@ -2075,6 +2084,10 @@ impl Channel for FeishuChannel {
     }
 
     async fn send(&self, msg: OutboundMessage) -> Result<(), ChannelError> {
+        let msg = OutboundMessage {
+            content: Self::strip_thinking_tags(&msg.content),
+            ..msg
+        };
         let receive_id = if msg.chat_id.starts_with("oc_") { &msg.chat_id } else { &msg.reply_to.as_ref().unwrap_or(&msg.chat_id) };
         let receive_id_type = if msg.chat_id.starts_with("oc_") { "chat_id" } else { "open_id" };