diff --git a/apps/chat.js b/apps/chat.js
index 6cf4561..3de259a 100644
--- a/apps/chat.js
+++ b/apps/chat.js
@@ -1514,6 +1514,7 @@ export class chatgpt extends plugin {
           logger.info('开启Claude新对话，但旧对话未结束，自动结束上一次对话')
           await redis.del(`CHATGPT:SLACK_CONVERSATION:${e.sender.user_id}`)
         }
+        logger.info('send preset: ' + preset.content)
         response = await client.sendMessage(preset.content, e)
         await e.reply(response, true)
       }
diff --git a/utils/common.js b/utils/common.js
index 59ea05a..c5e3aa0 100644
--- a/utils/common.js
+++ b/utils/common.js
@@ -422,11 +422,15 @@ export async function isCN () {
   }
 }
 
-export function limitString (str, maxLength) {
+export function limitString (str, maxLength, addDots = true) {
   if (str.length <= maxLength) {
     return str
   } else {
-    return str.slice(0, maxLength) + '...'
+    if (addDots) {
+      return str.slice(0, maxLength) + '...'
+    } else {
+      return str.slice(0, maxLength)
+    }
   }
 }
 
diff --git a/utils/slack/slackClient.js b/utils/slack/slackClient.js
index 415b174..cb7b412 100644
--- a/utils/slack/slackClient.js
+++ b/utils/slack/slackClient.js
@@ -1,6 +1,7 @@
 import { Config } from '../config.js'
 import slack from '@slack/bolt'
 import delay from 'delay'
+import {limitString} from "../common.js";
 let proxy
 if (Config.proxy) {
   try {
@@ -33,6 +34,10 @@ export class SlackClaudeClient {
     if (t > 10) {
       return 'claude 未响应'
     }
+    if (prompt.length > 3990) {
+      logger.warn('消息长度大于slack限制，长度剪切至3990')
+      prompt = limitString(prompt, 3990, false)
+    }
     let qq = e.sender.user_id
     let channels = await this.app.client.conversations.list({
       token: this.config.slackUserToken,