diff --git a/backend/src/main/java/com/openisle/controller/UserController.java b/backend/src/main/java/com/openisle/controller/UserController.java
index 1aef3a650..0501c07b1 100644
--- a/backend/src/main/java/com/openisle/controller/UserController.java
+++ b/backend/src/main/java/com/openisle/controller/UserController.java
@@ -75,7 +75,7 @@ public class UserController {
 
     @PutMapping("/me")
     public ResponseEntity<?> updateProfile(@RequestBody UpdateProfileDto dto,
-                                                 Authentication auth) {
+                                           Authentication auth) {
         User user = userService.updateProfile(auth.getName(), dto.getUsername(), dto.getIntroduction());
         return ResponseEntity.ok(Map.of(
                 "token", jwtService.generateToken(user.getUsername()),
@@ -239,6 +239,7 @@ public class UserController {
         dto.setFollowing(subscriptionService.countSubscribed(user.getUsername()));
         dto.setCreatedAt(user.getCreatedAt());
         dto.setLastPostTime(postService.getLastPostTime(user.getUsername()));
+        dto.setLastCommentTime(commentService.getLastCommentTimeOfUserByUserId(user.getId()));
         dto.setTotalViews(postService.getTotalViews(user.getUsername()));
         dto.setVisitedDays(userVisitService.countVisits(user.getUsername()));
         dto.setReadPosts(postReadService.countReads(user.getUsername()));
@@ -306,6 +307,7 @@ public class UserController {
         private long following;
         private java.time.LocalDateTime createdAt;
         private java.time.LocalDateTime lastPostTime;
+        private java.time.LocalDateTime lastCommentTime;
         private long totalViews;
         private long visitedDays;
         private long readPosts;
diff --git a/backend/src/main/java/com/openisle/repository/CommentRepository.java b/backend/src/main/java/com/openisle/repository/CommentRepository.java
index 1b4b8e092..12f20fecd 100644
--- a/backend/src/main/java/com/openisle/repository/CommentRepository.java
+++ b/backend/src/main/java/com/openisle/repository/CommentRepository.java
@@ -23,4 +23,8 @@ public interface CommentRepository extends JpaRepository<Comment, Long> {
     @org.springframework.data.jpa.repository.Query("SELECT COUNT(c) FROM Comment c WHERE c.author.username = :username AND c.createdAt >= :start")
     long countByAuthorAfter(@org.springframework.data.repository.query.Param("username") String username,
                             @org.springframework.data.repository.query.Param("start") java.time.LocalDateTime start);
+
+    @org.springframework.data.jpa.repository.Query("SELECT MAX(c.createdAt) FROM Comment c WHERE c.author.id = :userId")
+    java.time.LocalDateTime findLastCommentTimeOfUserByUserId(@org.springframework.data.repository.query.Param("userId") Long userId);
+
 }
diff --git a/backend/src/main/java/com/openisle/service/CommentService.java b/backend/src/main/java/com/openisle/service/CommentService.java
index ddae361f9..96ed10f4e 100644
--- a/backend/src/main/java/com/openisle/service/CommentService.java
+++ b/backend/src/main/java/com/openisle/service/CommentService.java
@@ -76,6 +76,10 @@ public class CommentService {
         return comment;
     }
 
+    public java.time.LocalDateTime getLastCommentTimeOfUserByUserId(Long userId) { // 根据用户id查询该用户最后回复时间
+        return commentRepository.findLastCommentTimeOfUserByUserId(userId);
+    }
+
     @Transactional
     public Comment addReply(String username, Long parentId, String content) {
         log.debug("addReply called by user {} for parent comment {}", username, parentId);
diff --git a/frontend/src/views/ProfileView.vue b/frontend/src/views/ProfileView.vue
index 0a9308cc3..538830a6c 100644
--- a/frontend/src/views/ProfileView.vue
+++ b/frontend/src/views/ProfileView.vue
@@ -44,6 +44,10 @@
           <div class="profile-info-item-label">最后发帖时间:</div>
           <div class="profile-info-item-value">{{ formatDate(user.lastPostTime) }}</div>
         </div>
+        <div class="profile-info-item">
+          <div class="profile-info-item-label">最后评论时间:</div>
+          <div class="profile-info-item-value">{{ user.lastCommentTime!=null?formatDate(user.lastCommentTime):"暂无评论" }}</div>
+        </div>
         <div class="profile-info-item">
           <div class="profile-info-item-label">浏览量:</div>
           <div class="profile-info-item-value">{{ user.totalViews }}</div>