diff --git a/backend/src/main/java/com/openisle/controller/PostController.java b/backend/src/main/java/com/openisle/controller/PostController.java
index 736cba857..3dd4662e0 100644
--- a/backend/src/main/java/com/openisle/controller/PostController.java
+++ b/backend/src/main/java/com/openisle/controller/PostController.java
@@ -62,6 +62,16 @@ public class PostController {
         postService.deletePost(id, auth.getName());
     }
 
+    @PostMapping("/{id}/close")
+    public PostSummaryDto close(@PathVariable Long id, Authentication auth) {
+        return postMapper.toSummaryDto(postService.closePost(id, auth.getName()));
+    }
+
+    @PostMapping("/{id}/reopen")
+    public PostSummaryDto reopen(@PathVariable Long id, Authentication auth) {
+        return postMapper.toSummaryDto(postService.reopenPost(id, auth.getName()));
+    }
+
     @GetMapping("/{id}")
     public ResponseEntity<PostDetailDto> getPost(@PathVariable Long id, Authentication auth) {
         String viewer = auth != null ? auth.getName() : null;
diff --git a/backend/src/main/java/com/openisle/dto/PostSummaryDto.java b/backend/src/main/java/com/openisle/dto/PostSummaryDto.java
index e47a03e11..665c590f7 100644
--- a/backend/src/main/java/com/openisle/dto/PostSummaryDto.java
+++ b/backend/src/main/java/com/openisle/dto/PostSummaryDto.java
@@ -32,5 +32,6 @@ public class PostSummaryDto {
     private PostType type;
     private LotteryDto lottery;
     private boolean rssExcluded;
+    private boolean closed;
 }
 
diff --git a/backend/src/main/java/com/openisle/mapper/PostMapper.java b/backend/src/main/java/com/openisle/mapper/PostMapper.java
index 0ef432228..d36b25e32 100644
--- a/backend/src/main/java/com/openisle/mapper/PostMapper.java
+++ b/backend/src/main/java/com/openisle/mapper/PostMapper.java
@@ -64,6 +64,7 @@ public class PostMapper {
         dto.setStatus(post.getStatus());
         dto.setPinnedAt(post.getPinnedAt());
         dto.setRssExcluded(post.getRssExcluded() == null || post.getRssExcluded());
+        dto.setClosed(post.isClosed());
 
         List<ReactionDto> reactions = reactionService.getReactionsForPost(post.getId())
                 .stream()
diff --git a/backend/src/main/java/com/openisle/model/Post.java b/backend/src/main/java/com/openisle/model/Post.java
index d314ca9a0..ccd614574 100644
--- a/backend/src/main/java/com/openisle/model/Post.java
+++ b/backend/src/main/java/com/openisle/model/Post.java
@@ -64,6 +64,9 @@ public class Post {
     @Column(nullable = false)
     private PostType type = PostType.NORMAL;
 
+    @Column(nullable = false)
+    private boolean closed = false;
+
     @Column
     private LocalDateTime pinnedAt;
 
diff --git a/backend/src/main/java/com/openisle/service/CommentService.java b/backend/src/main/java/com/openisle/service/CommentService.java
index 3ac994e30..8121b80d9 100644
--- a/backend/src/main/java/com/openisle/service/CommentService.java
+++ b/backend/src/main/java/com/openisle/service/CommentService.java
@@ -52,6 +52,9 @@ public class CommentService {
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("User not found"));
         Post post = postRepository.findById(postId)
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
+        if (post.isClosed()) {
+            throw new IllegalStateException("Post closed");
+        }
         Comment comment = new Comment();
         comment.setAuthor(author);
         comment.setPost(post);
@@ -94,6 +97,9 @@ public class CommentService {
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("User not found"));
         Comment parent = commentRepository.findById(parentId)
                 .orElseThrow(() -> new IllegalArgumentException("Comment not found"));
+        if (parent.getPost().isClosed()) {
+            throw new IllegalStateException("Post closed");
+        }
         Comment comment = new Comment();
         comment.setAuthor(author);
         comment.setPost(parent.getPost());
diff --git a/backend/src/main/java/com/openisle/service/PostService.java b/backend/src/main/java/com/openisle/service/PostService.java
index 2e1106e04..e9a205fb9 100644
--- a/backend/src/main/java/com/openisle/service/PostService.java
+++ b/backend/src/main/java/com/openisle/service/PostService.java
@@ -512,6 +512,30 @@ public class PostService {
         return postRepository.save(post);
     }
 
+    public Post closePost(Long id, String username) {
+        Post post = postRepository.findById(id)
+                .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
+        User user = userRepository.findByUsername(username)
+                .orElseThrow(() -> new com.openisle.exception.NotFoundException("User not found"));
+        if (!user.getId().equals(post.getAuthor().getId()) && user.getRole() != Role.ADMIN) {
+            throw new IllegalArgumentException("Unauthorized");
+        }
+        post.setClosed(true);
+        return postRepository.save(post);
+    }
+
+    public Post reopenPost(Long id, String username) {
+        Post post = postRepository.findById(id)
+                .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
+        User user = userRepository.findByUsername(username)
+                .orElseThrow(() -> new com.openisle.exception.NotFoundException("User not found"));
+        if (!user.getId().equals(post.getAuthor().getId()) && user.getRole() != Role.ADMIN) {
+            throw new IllegalArgumentException("Unauthorized");
+        }
+        post.setClosed(false);
+        return postRepository.save(post);
+    }
+
     @org.springframework.transaction.annotation.Transactional
     public Post updatePost(Long id,
                            String username,
diff --git a/frontend_nuxt/components/CommentItem.vue b/frontend_nuxt/components/CommentItem.vue
index 2ea71e0d0..10f74bf4e 100644
--- a/frontend_nuxt/components/CommentItem.vue
+++ b/frontend_nuxt/components/CommentItem.vue
@@ -57,7 +57,7 @@
           v-if="showEditor"
           @submit="submitReply"
           :loading="isWaitingForReply"
-          :disabled="!loggedIn"
+          :disabled="!loggedIn || postClosed"
           :show-login-overlay="!loggedIn"
           :parent-user-name="comment.userName"
         />
@@ -76,6 +76,7 @@
               :level="level + 1"
               :default-show-replies="item.openReplies"
               :post-author-id="postAuthorId"
+              :post-closed="postClosed"
             />
           </template>
         </BaseTimeline>
@@ -122,6 +123,10 @@ const props = defineProps({
     type: [Number, String],
     required: true,
   },
+  postClosed: {
+    type: Boolean,
+    default: false,
+  },
 })
 
 const emit = defineEmits(['deleted'])
@@ -148,6 +153,7 @@ const toggleReplies = () => {
 }
 
 const toggleEditor = () => {
+  if (props.postClosed) return
   showEditor.value = !showEditor.value
   if (showEditor.value) {
     setTimeout(() => {
@@ -213,6 +219,10 @@ const deleteComment = async () => {
 }
 const submitReply = async (parentUserName, text, clear) => {
   if (!text.trim()) return
+  if (props.postClosed) {
+    toast.error('帖子已关闭')
+    return
+  }
   isWaitingForReply.value = true
   const token = getToken()
   if (!token) {
diff --git a/frontend_nuxt/pages/posts/[id]/index.vue b/frontend_nuxt/pages/posts/[id]/index.vue
index d2e76abc1..64d090aac 100644
--- a/frontend_nuxt/pages/posts/[id]/index.vue
+++ b/frontend_nuxt/pages/posts/[id]/index.vue
@@ -15,6 +15,7 @@
         <div class="article-title-container-right">
           <div v-if="status === 'PENDING'" class="article-pending-button">审核中</div>
           <div v-if="status === 'REJECTED'" class="article-block-button">已拒绝</div>
+          <div v-if="closed" class="article-closed-button">已关闭</div>
           <div
             v-if="loggedIn && !isAuthor && !subscribed"
             class="article-subscribe-button"
@@ -171,7 +172,7 @@
         <CommentEditor
           @submit="postComment"
           :loading="isWaitingPostingComment"
-          :disabled="!loggedIn"
+          :disabled="!loggedIn || closed"
           :show-login-overlay="!loggedIn"
           :parent-user-name="author.username"
         />
@@ -196,6 +197,7 @@
               :level="0"
               :default-show-replies="item.openReplies"
               :post-author-id="author.id"
+              :post-closed="closed"
               @deleted="onCommentDeleted"
             />
           </template>
@@ -278,6 +280,7 @@ const tags = ref([])
 const postReactions = ref([])
 const comments = ref([])
 const status = ref('PUBLISHED')
+const closed = ref(false)
 const pinnedAt = ref(null)
 const rssExcluded = ref(false)
 const isWaitingPostingComment = ref(false)
@@ -361,6 +364,11 @@ const articleMenuItems = computed(() => {
   if (isAuthor.value || isAdmin.value) {
     items.push({ text: '编辑文章', onClick: () => editPost() })
     items.push({ text: '删除文章', color: 'red', onClick: deletePost })
+    if (closed.value) {
+      items.push({ text: '重新打开帖子', onClick: () => reopenPost() })
+    } else {
+      items.push({ text: '关闭帖子', onClick: () => closePost() })
+    }
   }
   if (isAdmin.value) {
     if (pinnedAt.value) {
@@ -496,6 +504,7 @@ watchEffect(() => {
   postReactions.value = data.reactions || []
   subscribed.value = !!data.subscribed
   status.value = data.status
+  closed.value = data.closed
   pinnedAt.value = data.pinnedAt
   rssExcluded.value = data.rssExcluded
   postTime.value = TimeManager.format(data.createdAt)
@@ -555,6 +564,10 @@ const onSliderInput = (e) => {
 
 const postComment = async (parentUserName, text, clear) => {
   if (!text.trim()) return
+  if (closed.value) {
+    toast.error('帖子已关闭')
+    return
+  }
   console.debug('Posting comment', { postId, text })
   isWaitingPostingComment.value = true
   const token = getToken()
@@ -693,6 +706,38 @@ const includeRss = async () => {
   }
 }
 
+const closePost = async () => {
+  const token = getToken()
+  if (!token) return
+  const res = await fetch(`${API_BASE_URL}/api/posts/${postId}/close`, {
+    method: 'POST',
+    headers: { Authorization: `Bearer ${token}` },
+  })
+  if (res.ok) {
+    closed.value = true
+    toast.success('已关闭')
+    await refreshPost()
+  } else {
+    toast.error('操作失败')
+  }
+}
+
+const reopenPost = async () => {
+  const token = getToken()
+  if (!token) return
+  const res = await fetch(`${API_BASE_URL}/api/posts/${postId}/reopen`, {
+    method: 'POST',
+    headers: { Authorization: `Bearer ${token}` },
+  })
+  if (res.ok) {
+    closed.value = false
+    toast.success('已重新打开')
+    await refreshPost()
+  } else {
+    toast.error('操作失败')
+  }
+}
+
 const editPost = () => {
   navigateTo(`/posts/${postId}/edit`, { replace: true })
 }
@@ -1050,6 +1095,15 @@ onMounted(async () => {
   font-size: 14px;
 }
 
+.article-closed-button {
+  background-color: var(--background-color);
+  color: gray;
+  border: 1px solid gray;
+  padding: 5px 10px;
+  border-radius: 8px;
+  font-size: 14px;
+}
+
 .article-title {
   font-size: 30px;
   font-weight: bold;