diff --git a/backend/src/main/java/com/openisle/dto/PostMetaDto.java b/backend/src/main/java/com/openisle/dto/PostMetaDto.java
index 1667b047f..81df37a9f 100644
--- a/backend/src/main/java/com/openisle/dto/PostMetaDto.java
+++ b/backend/src/main/java/com/openisle/dto/PostMetaDto.java
@@ -1,6 +1,7 @@
 package com.openisle.dto;
 
 import java.time.LocalDateTime;
+import java.util.List;
 import lombok.Data;
 
 /** Lightweight post metadata used in user profile lists. */
@@ -11,6 +12,8 @@ public class PostMetaDto {
   private String title;
   private String snippet;
   private LocalDateTime createdAt;
-  private String category;
+  private CategoryDto category;
+  private List<TagDto> tags;
   private long views;
+  private long commentCount;
 }
diff --git a/backend/src/main/java/com/openisle/mapper/UserMapper.java b/backend/src/main/java/com/openisle/mapper/UserMapper.java
index 43aaf8ef0..50ad6cb27 100644
--- a/backend/src/main/java/com/openisle/mapper/UserMapper.java
+++ b/backend/src/main/java/com/openisle/mapper/UserMapper.java
@@ -5,6 +5,7 @@ import com.openisle.model.Comment;
 import com.openisle.model.Post;
 import com.openisle.model.User;
 import com.openisle.service.*;
+import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.security.core.Authentication;
@@ -23,6 +24,8 @@ public class UserMapper {
   private final PostReadService postReadService;
   private final LevelService levelService;
   private final MedalService medalService;
+  private final TagMapper tagMapper;
+  private final CategoryMapper categoryMapper;
 
   @Value("${app.snippet-length}")
   private int snippetLength;
@@ -88,7 +91,12 @@ public class UserMapper {
       dto.setSnippet(content);
     }
     dto.setCreatedAt(post.getCreatedAt());
-    dto.setCategory(post.getCategory().getName());
+    dto.setCategory(categoryMapper.toDto(post.getCategory()));
+    dto.setTags(post.getTags().stream().map(tagMapper::toDto).collect(Collectors.toList()));
+    if (post.getLastReplyAt() == null) {
+      commentService.updatePostCommentStats(post);
+    }
+    dto.setCommentCount(post.getCommentCount());
     dto.setViews(post.getViews());
     return dto;
   }
diff --git a/frontend_nuxt/components/ProfileTimelineCommentGroup.vue b/frontend_nuxt/components/ProfileTimelineCommentGroup.vue
new file mode 100644
index 000000000..3db68815e
--- /dev/null
+++ b/frontend_nuxt/components/ProfileTimelineCommentGroup.vue
@@ -0,0 +1,168 @@
+<template>
+  <div class="timeline-container">
+    <div class="timeline-header">
+      <div class="timeline-title">{{ headerText }}</div>
+      <div class="timeline-date">{{ headerDate }}</div>
+    </div>
+    <div class="comment-content">
+      <div v-for="entry in entries" :key="entry.comment.id" class="comment-content-item">
+        <div class="comment-content-item-main">
+          <comment-one class="comment-content-item-icon" />
+          <template v-if="!entry.comment.parentComment">
+            <span class="comment-prefix">
+              在
+              <NuxtLink :to="entry.postLink" class="timeline-link">
+                {{ entry.comment.post.title }}
+              </NuxtLink>
+              下评论了
+            </span>
+            <NuxtLink :to="entry.commentLink" class="timeline-comment-link">
+              {{ stripContent(entry.comment.content) }}
+            </NuxtLink>
+          </template>
+          <template v-else>
+            <span class="comment-prefix">
+              在
+              <NuxtLink :to="entry.postLink" class="timeline-link">
+                {{ entry.comment.post.title }}
+              </NuxtLink>
+              下对
+              <NuxtLink :to="entry.parentLink" class="timeline-link">
+                {{ stripContent(entry.comment.parentComment.content) }}
+              </NuxtLink>
+              回复了
+            </span>
+            <NuxtLink :to="entry.commentLink" class="timeline-comment-link">
+              {{ stripContent(entry.comment.content) }}
+            </NuxtLink>
+          </template>
+        </div>
+        <div class="timeline-date">{{ formatDate(entry.createdAt) }}</div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { computed } from 'vue'
+import { stripMarkdownLength } from '~/utils/markdown'
+import TimeManager from '~/utils/time'
+
+const props = defineProps({
+  item: {
+    type: Object,
+    required: true,
+  },
+})
+
+const entries = computed(() =>
+  (props.item.entries || []).map((entry) => ({
+    ...entry,
+    postLink: `/posts/${entry.comment.post.id}`,
+    commentLink: `/posts/${entry.comment.post.id}#comment-${entry.comment.id}`,
+    parentLink: entry.comment.parentComment
+      ? `/posts/${entry.comment.post.id}#comment-${entry.comment.parentComment.id}`
+      : undefined,
+  })),
+)
+
+const commentCount = computed(
+  () => entries.value.filter((entry) => !entry.comment.parentComment).length,
+)
+
+const replyCount = computed(
+  () => entries.value.filter((entry) => entry.comment.parentComment).length,
+)
+
+const headerText = computed(() => {
+  if (commentCount.value && replyCount.value) {
+    return `发布了${commentCount.value}条评论和${replyCount.value}条回复`
+  }
+  if (commentCount.value) {
+    return `发布了${commentCount.value}条评论`
+  }
+  if (replyCount.value) {
+    return `发布了${replyCount.value}条回复`
+  }
+  return '发布了评论'
+})
+
+const headerDate = computed(() => TimeManager.format(props.item.createdAt))
+
+const formatDate = (date) => TimeManager.format(date)
+
+const stripContent = (content) => stripMarkdownLength(content || '', 200)
+</script>
+
+<style scoped>
+.timeline-container {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.timeline-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.timeline-title {
+  font-weight: 600;
+  color: var(--primary-color);
+}
+
+.timeline-date {
+  color: var(--text-color-secondary);
+  font-size: 14px;
+}
+
+.comment-content {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.comment-content-item {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.comment-content-item-main {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.comment-content-item-icon {
+  color: var(--primary-color);
+  font-size: 18px;
+}
+
+.comment-prefix {
+  color: var(--text-color-secondary);
+  font-size: 14px;
+}
+
+.timeline-comment-link {
+  display: inline-flex;
+  gap: 6px;
+  align-items: center;
+  color: var(--text-color);
+  font-size: 15px;
+  line-height: 1.6;
+}
+
+.timeline-comment-link:hover {
+  color: var(--primary-color);
+}
+
+.timeline-link {
+  color: var(--primary-color);
+}
+
+.timeline-link:hover {
+  color: var(--primary-color-hover);
+}
+</style>
diff --git a/frontend_nuxt/components/ProfileTimelinePostItem.vue b/frontend_nuxt/components/ProfileTimelinePostItem.vue
new file mode 100644
index 000000000..91852aa09
--- /dev/null
+++ b/frontend_nuxt/components/ProfileTimelinePostItem.vue
@@ -0,0 +1,79 @@
+<template>
+  <div class="timeline-container">
+    <div class="timeline-header">
+      <div class="timeline-title">发布了文章</div>
+      <div class="timeline-date">{{ formattedDate }}</div>
+    </div>
+    <div class="article-container">
+      <NuxtLink :to="postLink" class="timeline-article-link">
+        {{ props.item.post.title }}
+      </NuxtLink>
+      <div class="timeline-snippet">
+        {{ postSnippet }}
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { computed } from 'vue'
+import { stripMarkdown } from '~/utils/markdown'
+import TimeManager from '~/utils/time'
+
+const props = defineProps({
+  item: {
+    type: Object,
+    required: true,
+  },
+})
+
+const formattedDate = computed(() => TimeManager.format(props.item.createdAt))
+const postLink = computed(() => `/posts/${props.item.post.id}`)
+const postSnippet = computed(() => stripMarkdown(props.item.post?.snippet ?? ''))
+</script>
+
+<style scoped>
+.timeline-container {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.timeline-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.timeline-title {
+  font-weight: 600;
+  color: var(--primary-color);
+}
+
+.timeline-date {
+  color: var(--text-color-secondary);
+  font-size: 14px;
+}
+
+.article-container {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.timeline-article-link {
+  font-size: 18px;
+  font-weight: 600;
+  color: var(--text-color);
+}
+
+.timeline-article-link:hover {
+  color: var(--primary-color);
+}
+
+.timeline-snippet {
+  color: var(--text-color-secondary);
+  font-size: 14px;
+  line-height: 1.6;
+}
+</style>
diff --git a/frontend_nuxt/pages/users/[id].vue b/frontend_nuxt/pages/users/[id].vue
index 49b66cdcd..c141ec7d4 100644
--- a/frontend_nuxt/pages/users/[id].vue
+++ b/frontend_nuxt/pages/users/[id].vue
@@ -212,107 +212,9 @@
             <div class="timeline-list">
               <BaseTimeline :items="filteredTimelineItems">
                 <template #item="{ item }">
-                  <!-- <template v-if="item.type === 'post'">
-                    发布了文章
-                    <NuxtLink :to="`/posts/${item.post.id}`" class="timeline-link">
-                      {{ item.post.title }}
-                    </NuxtLink>
-                    <div class="timeline-date">{{ formatDate(item.createdAt) }}</div>
-                  </template> -->
-                  <template v-if="item.type === 'post'">
-                    <div class="ttimeline-container">
-                      <div class="timeline-header">
-                        <div class="timeline-title">发布了文章</div>
-                        <div class="timeline-date">{{ formatDate(item.createdAt) }}</div>
-                      </div>
-                      <div class="article-container">
-                        <NuxtLink :to="`/posts/${item.post.id}`" class="timeline-article-link">
-                          {{ item.post.title }}
-                        </NuxtLink>
-                        <div class="timeline-snippet">
-                          {{ stripMarkdown(item.post.snippet) }}
-                        </div>
-                      </div>
-                    </div>
-                  </template>
-                  <!-- <template v-else-if="item.type === 'comment'">
-                    在
-                    <NuxtLink :to="`/posts/${item.comment.post.id}`" class="timeline-link">
-                      {{ item.comment.post.title }}
-                    </NuxtLink>
-                    下评论了
-                    <NuxtLink :to="`/posts/${item.comment.post.id}#comment-${item.comment.id}`" class="timeline-link">
-                      {{ stripMarkdownLength(item.comment.content, 200) }}
-                    </NuxtLink>
-                    <div class="timeline-date">{{ formatDate(item.createdAt) }}</div>
-                  </template> -->
-                  <template v-else-if="item.type === 'comment'">
-                    <div class="ttimeline-container">
-                      <div class="timeline-header">
-                        <div class="timeline-title">发布了4条评论</div>
-                        <div class="timeline-date">{{ formatDate(item.createdAt) }}</div>
-                      </div>
-                      <div class="comment-content">
-                        <div class="comment-content-item">
-                          <div class="comment-content-item-main">
-                            <comment-one class="comment-content-item-icon" />
-                            <NuxtLink
-                              :to="`/posts/${item.comment.post.id}#comment-${item.comment.id}`"
-                              class="timeline-comment-link"
-                            >
-                              {{ stripMarkdownLength(item.comment.content, 200) }}
-                            </NuxtLink>
-                          </div>
-                          <div class="timeline-date">{{ formatDate(item.createdAt) }}</div>
-                        </div>
-                        <div class="comment-content-item">
-                          <div class="comment-content-item-main">
-                            <comment-one class="comment-content-item-icon" />
-                            <NuxtLink
-                              :to="`/posts/${item.comment.post.id}#comment-${item.comment.id}`"
-                              class="timeline-comment-link"
-                            >
-                              {{ stripMarkdownLength(item.comment.content, 200) }}
-                            </NuxtLink>
-                          </div>
-                          <div class="timeline-date">{{ formatDate(item.createdAt) }}</div>
-                        </div>
-                        <div class="comment-content-item">
-                          <div class="comment-content-item-main">
-                            <comment-one class="comment-content-item-icon" />
-                            <NuxtLink
-                              :to="`/posts/${item.comment.post.id}#comment-${item.comment.id}`"
-                              class="timeline-comment-link"
-                            >
-                              {{ stripMarkdownLength(item.comment.content, 200) }}
-                            </NuxtLink>
-                          </div>
-                          <div class="timeline-date">{{ formatDate(item.createdAt) }}</div>
-                        </div>
-                      </div>
-                    </div>
-                  </template>
-                  <template v-else-if="item.type === 'reply'">
-                    在
-                    <NuxtLink :to="`/posts/${item.comment.post.id}`" class="timeline-link">
-                      {{ item.comment.post.title }}
-                    </NuxtLink>
-                    下对
-                    <NuxtLink
-                      :to="`/posts/${item.comment.post.id}#comment-${item.comment.parentComment.id}`"
-                      class="timeline-link"
-                    >
-                      {{ stripMarkdownLength(item.comment.parentComment.content, 200) }}
-                    </NuxtLink>
-                    回复了
-                    <NuxtLink
-                      :to="`/posts/${item.comment.post.id}#comment-${item.comment.id}`"
-                      class="timeline-link"
-                    >
-                      {{ stripMarkdownLength(item.comment.content, 200) }}
-                    </NuxtLink>
-                    <div class="timeline-date">{{ formatDate(item.createdAt) }}</div>
-                  </template>
+                  <ProfileTimelinePostItem v-if="item.type === 'post'" :item="item" />
+                  <ProfileTimelineCommentGroup v-else-if="item.type === 'comment'" :item="item" />
+                  <ProfileTimelineCommentGroup v-else-if="item.type === 'reply'" :item="item" />
                   <template v-else-if="item.type === 'tag'">
                     创建了标签
                     <span class="timeline-link" @click="gotoTag(item.tag)">
@@ -385,6 +287,8 @@ import BasePlaceholder from '~/components/BasePlaceholder.vue'
 import BaseTimeline from '~/components/BaseTimeline.vue'
 import BaseTabs from '~/components/BaseTabs.vue'
 import LevelProgress from '~/components/LevelProgress.vue'
+import ProfileTimelineCommentGroup from '~/components/ProfileTimelineCommentGroup.vue'
+import ProfileTimelinePostItem from '~/components/ProfileTimelinePostItem.vue'
 import UserList from '~/components/UserList.vue'
 import { toast } from '~/main'
 import { authState, getToken } from '~/utils/auth'
@@ -490,6 +394,22 @@ const fetchSummary = async () => {
   }
 }
 
+const isSameDay = (a, b) => {
+  const dateA = new Date(a)
+  const dateB = new Date(b)
+  return (
+    dateA.getFullYear() === dateB.getFullYear() &&
+    dateA.getMonth() === dateB.getMonth() &&
+    dateA.getDate() === dateB.getDate()
+  )
+}
+
+const createCommentEntry = (item) => ({
+  type: item.type,
+  comment: item.comment,
+  createdAt: item.createdAt,
+})
+
 const fetchTimeline = async () => {
   const [postsRes, repliesRes, tagsRes] = await Promise.all([
     fetch(`${API_BASE_URL}/api/users/${username}/posts?limit=50`),
@@ -520,7 +440,32 @@ const fetchTimeline = async () => {
     })),
   ]
   mapped.sort((a, b) => new Date(b.createdAt) - new Date(a.createdAt))
-  timelineItems.value = mapped
+
+  const grouped = []
+  for (const item of mapped) {
+    if (item.type === 'comment') {
+      const last = grouped[grouped.length - 1]
+      if (last && last.type === 'comment' && isSameDay(last.createdAt, item.createdAt)) {
+        last.entries.push(createCommentEntry(item))
+        if (new Date(item.createdAt) > new Date(last.createdAt)) {
+          last.createdAt = item.createdAt
+        }
+      } else {
+        grouped.push({
+          ...item,
+          entries: [createCommentEntry(item)],
+        })
+      }
+    } else if (item.type === 'reply') {
+      grouped.push({
+        ...item,
+        entries: [createCommentEntry(item)],
+      })
+    } else {
+      grouped.push(item)
+    }
+  }
+  timelineItems.value = grouped
 }
 
 const fetchFollowUsers = async () => {