diff --git a/main/manager-api/src/main/java/xiaozhi/modules/agent/dao/AiAgentChatHistoryDao.java b/main/manager-api/src/main/java/xiaozhi/modules/agent/dao/AiAgentChatHistoryDao.java
index b75312d2..7c9bf1eb 100644
--- a/main/manager-api/src/main/java/xiaozhi/modules/agent/dao/AiAgentChatHistoryDao.java
+++ b/main/manager-api/src/main/java/xiaozhi/modules/agent/dao/AiAgentChatHistoryDao.java
@@ -1,6 +1,9 @@
 package xiaozhi.modules.agent.dao;
 
+import java.util.List;
+
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 
@@ -15,12 +18,6 @@ import xiaozhi.modules.agent.entity.AgentChatHistoryEntity;
  */
 @Mapper
 public interface AiAgentChatHistoryDao extends BaseMapper<AgentChatHistoryEntity> {
-    /**
-     * 根据智能体ID删除音频
-     *
-     * @param agentId 智能体ID
-     */
-    void deleteAudioByAgentId(String agentId);
 
     /**
      * 根据智能体ID删除聊天历史记录
@@ -35,4 +32,19 @@ public interface AiAgentChatHistoryDao extends BaseMapper<AgentChatHistoryEntity
      * @param agentId 智能体ID
      */
     void deleteAudioIdByAgentId(String agentId);
+
+    /**
+     * 根据智能体ID获取所有音频ID列表
+     *
+     * @param agentId 智能体ID
+     * @return 音频ID列表
+     */
+    List<String> getAudioIdsByAgentId(String agentId);
+
+    /**
+     * 批量删除音频
+     *
+     * @param audioIds 音频ID列表
+     */
+    void deleteAudioByIds(@Param("audioIds") List<String> audioIds);
 }
diff --git a/main/manager-api/src/main/java/xiaozhi/modules/agent/service/impl/AgentChatHistoryServiceImpl.java b/main/manager-api/src/main/java/xiaozhi/modules/agent/service/impl/AgentChatHistoryServiceImpl.java
index 76da2fc8..63b820c9 100644
--- a/main/manager-api/src/main/java/xiaozhi/modules/agent/service/impl/AgentChatHistoryServiceImpl.java
+++ b/main/manager-api/src/main/java/xiaozhi/modules/agent/service/impl/AgentChatHistoryServiceImpl.java
@@ -84,7 +84,16 @@ public class AgentChatHistoryServiceImpl extends ServiceImpl<AiAgentChatHistoryD
     @Transactional(rollbackFor = Exception.class)
     public void deleteByAgentId(String agentId, Boolean deleteAudio, Boolean deleteText) {
         if (deleteAudio) {
-            baseMapper.deleteAudioByAgentId(agentId);
+            // 分批删除音频,避免超时
+            List<String> audioIds = baseMapper.getAudioIdsByAgentId(agentId);
+            if (audioIds != null && !audioIds.isEmpty()) {
+                int batchSize = 1000; // 每批删除1000条
+                for (int i = 0; i < audioIds.size(); i += batchSize) {
+                    int end = Math.min(i + batchSize, audioIds.size());
+                    List<String> batch = audioIds.subList(i, end);
+                    baseMapper.deleteAudioByIds(batch);
+                }
+            }
         }
         if (deleteAudio && !deleteText) {
             baseMapper.deleteAudioIdByAgentId(agentId);
@@ -107,7 +116,7 @@ public class AgentChatHistoryServiceImpl extends ServiceImpl<AiAgentChatHistoryD
                 // 添加此行，确保查询结果按照创建时间降序排列
                 // 使用id的原因：数据形式，id越大的创建时间就越晚，所以使用id的结果和创建时间降序排列结果一样
                 // id作为降序排列的优势，性能高，有主键索引，不用在排序的时候重新进行排除扫描比较
-                .orderByDesc(AgentChatHistoryEntity::getId); 
+                .orderByDesc(AgentChatHistoryEntity::getId);
 
         // 构建分页查询，查询前50页数据
         Page<AgentChatHistoryEntity> pageParam = new Page<>(0, 50);
diff --git a/main/manager-api/src/main/resources/db/changelog/202512192245.sql b/main/manager-api/src/main/resources/db/changelog/202512192245.sql
new file mode 100644
index 00000000..7162fd1c
--- /dev/null
+++ b/main/manager-api/src/main/resources/db/changelog/202512192245.sql
@@ -0,0 +1,2 @@
+-- 为智能体聊天历史记录添加音频ID索引
+ALTER TABLE ai_agent_chat_history ADD INDEX idx_ai_agent_chat_history_audio_id (audio_id);
diff --git a/main/manager-api/src/main/resources/db/changelog/db.changelog-master.yaml b/main/manager-api/src/main/resources/db/changelog/db.changelog-master.yaml
index 67d912a1..22d0d431 100755
--- a/main/manager-api/src/main/resources/db/changelog/db.changelog-master.yaml
+++ b/main/manager-api/src/main/resources/db/changelog/db.changelog-master.yaml
@@ -452,3 +452,10 @@ databaseChangeLog:
         - sqlFile:
             encoding: utf8
             path: classpath:db/changelog/202512161529.sql
+  - changeSet:
+      id: 202512192245
+      author: hrz
+      changes:
+        - sqlFile:
+            encoding: utf8
+            path: classpath:db/changelog/202512192245.sql
\ No newline at end of file
diff --git a/main/manager-api/src/main/resources/mapper/agent/AiAgentChatHistoryDao.xml b/main/manager-api/src/main/resources/mapper/agent/AiAgentChatHistoryDao.xml
index 3e80f7fd..84e22fd1 100644
--- a/main/manager-api/src/main/resources/mapper/agent/AiAgentChatHistoryDao.xml
+++ b/main/manager-api/src/main/resources/mapper/agent/AiAgentChatHistoryDao.xml
@@ -22,13 +22,18 @@
     created_at, updated_at
   </sql>
 
-  <delete id="deleteAudioByAgentId">
-    DELETE FROM ai_agent_chat_audio 
-    WHERE id IN (
-      SELECT audio_id 
-      FROM ai_agent_chat_history 
-      WHERE agent_id = #{agentId}
-    )
+  <select id="getAudioIdsByAgentId" resultType="java.lang.String">
+    SELECT DISTINCT audio_id
+    FROM ai_agent_chat_history
+    WHERE agent_id = #{agentId} AND audio_id IS NOT NULL
+  </select>
+
+  <delete id="deleteAudioByIds">
+    DELETE FROM ai_agent_chat_audio
+    WHERE id IN
+    <foreach collection="audioIds" item="id" open="(" separator="," close=")">
+      #{id}
+    </foreach>
   </delete>
   
   <update id="deleteAudioIdByAgentId">