diff --git a/src/main/java/com/yolo/keyborad/controller/AiCompanionCommentController.java b/src/main/java/com/yolo/keyborad/controller/AiCompanionCommentController.java
index bb7eb28..6310a76 100644
--- a/src/main/java/com/yolo/keyborad/controller/AiCompanionCommentController.java
+++ b/src/main/java/com/yolo/keyborad/controller/AiCompanionCommentController.java
@@ -8,6 +8,7 @@ import com.yolo.keyborad.common.ErrorCode;
 import com.yolo.keyborad.common.ResultUtils;
 import com.yolo.keyborad.exception.BusinessException;
 import com.yolo.keyborad.model.dto.comment.CommentAddReq;
+import com.yolo.keyborad.model.dto.comment.CommentDeleteReq;
 import com.yolo.keyborad.model.dto.comment.CommentLikeReq;
 import com.yolo.keyborad.model.dto.comment.CommentPageReq;
 import com.yolo.keyborad.model.dto.comment.CommentReportReq;
@@ -56,6 +57,18 @@ public class AiCompanionCommentController {
         return ResultUtils.success(commentId);
     }
 
+    @PostMapping("/delete")
+    @Operation(summary = "删除评论", description = "删除当前用户自己发布的评论；若删除根评论，其下回复将不会继续展示")
+    public BaseResponse<Boolean> deleteComment(@RequestBody CommentDeleteReq req) {
+        if (req == null || req.getCommentId() == null) {
+            throw new BusinessException(ErrorCode.COMMENT_ID_EMPTY);
+        }
+
+        Long userId = StpUtil.getLoginIdAsLong();
+        commentService.deleteComment(userId, req.getCommentId());
+        return ResultUtils.success(true);
+    }
+
     @PostMapping("/page")
     @Operation(summary = "分页查询评论", description = "分页查询AI陪聊角色的评论列表，包含当前用户是否已点赞状态")
     public BaseResponse<IPage<CommentVO>> pageComments(@RequestBody CommentPageReq req) {
diff --git a/src/main/java/com/yolo/keyborad/model/dto/comment/CommentDeleteReq.java b/src/main/java/com/yolo/keyborad/model/dto/comment/CommentDeleteReq.java
new file mode 100644
index 0000000..99cbac4
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/model/dto/comment/CommentDeleteReq.java
@@ -0,0 +1,16 @@
+package com.yolo.keyborad.model.dto.comment;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Data;
+
+/*
+ * @author: ziin
+ * @date: 2026/3/20
+ */
+@Data
+@Schema(description = "删除评论请求")
+public class CommentDeleteReq {
+
+    @Schema(description = "评论ID", requiredMode = Schema.RequiredMode.REQUIRED)
+    private Long commentId;
+}
diff --git a/src/main/java/com/yolo/keyborad/model/vo/CommentVO.java b/src/main/java/com/yolo/keyborad/model/vo/CommentVO.java
index 85bf8a0..6366adf 100644
--- a/src/main/java/com/yolo/keyborad/model/vo/CommentVO.java
+++ b/src/main/java/com/yolo/keyborad/model/vo/CommentVO.java
@@ -23,6 +23,9 @@ public class CommentVO {
     @Schema(description = "发表评论的用户ID")
     private Long userId;
 
+    @Schema(description = "发表评论的用户UID")
+    private Long userUid;
+
     @Schema(description = "用户昵称")
     private String userName;
 
diff --git a/src/main/java/com/yolo/keyborad/service/KeyboardAiCompanionCommentService.java b/src/main/java/com/yolo/keyborad/service/KeyboardAiCompanionCommentService.java
index ccefeef..53011d9 100644
--- a/src/main/java/com/yolo/keyborad/service/KeyboardAiCompanionCommentService.java
+++ b/src/main/java/com/yolo/keyborad/service/KeyboardAiCompanionCommentService.java
@@ -23,6 +23,14 @@ public interface KeyboardAiCompanionCommentService extends IService<KeyboardAiCo
      */
     Long addComment(Long userId, Long companionId, String content, Long parentId, Long rootId);
 
+    /**
+     * 删除评论
+     *
+     * @param userId    当前用户ID
+     * @param commentId 评论ID
+     */
+    void deleteComment(Long userId, Long commentId);
+
     /**
      * 分页查询评论
      *
diff --git a/src/main/java/com/yolo/keyborad/service/impl/KeyboardAiCompanionCommentServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/KeyboardAiCompanionCommentServiceImpl.java
index e50262f..39c4ab8 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/KeyboardAiCompanionCommentServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/KeyboardAiCompanionCommentServiceImpl.java
@@ -1,9 +1,12 @@
 package com.yolo.keyborad.service.impl;
 
+import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.yolo.keyborad.common.ErrorCode;
+import com.yolo.keyborad.exception.BusinessException;
 import com.yolo.keyborad.mapper.KeyboardAiCompanionCommentMapper;
 import com.yolo.keyborad.model.entity.KeyboardAiCompanionComment;
 import com.yolo.keyborad.model.entity.KeyboardUser;
@@ -13,10 +16,11 @@ import com.yolo.keyborad.service.KeyboardAiCompanionCommentLikeService;
 import com.yolo.keyborad.service.UserService;
 import jakarta.annotation.Resource;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
-import java.util.HashMap;
 import java.util.ArrayList;
 import java.util.Date;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -29,6 +33,12 @@ import java.util.stream.Collectors;
 @Service
 public class KeyboardAiCompanionCommentServiceImpl extends ServiceImpl<KeyboardAiCompanionCommentMapper, KeyboardAiCompanionComment> implements KeyboardAiCompanionCommentService {
 
+    private static final short ACTIVE_STATUS = 1;
+
+    private static final short DELETED_STATUS = -1;
+
+    private static final long MAX_REPLY_PREVIEW_COUNT = 999L;
+
     @Resource
     private UserService userService;
 
@@ -43,19 +53,27 @@ public class KeyboardAiCompanionCommentServiceImpl extends ServiceImpl<KeyboardA
         comment.setContent(content);
         comment.setParentId(parentId);
         comment.setRootId(rootId);
-        comment.setStatus((short) 1);
+        comment.setStatus(ACTIVE_STATUS);
         comment.setLikeCount(0);
         comment.setCreatedAt(new Date());
         this.save(comment);
         return comment.getId();
     }
 
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public void deleteComment(Long userId, Long commentId) {
+        KeyboardAiCompanionComment comment = getActiveComment(commentId);
+        validateDeletePermission(userId, comment.getUserId());
+        softDeleteComment(commentId);
+    }
+
     @Override
     public IPage<CommentVO> pageComments(Long companionId, Integer pageNum, Integer pageSize) {
         Page<KeyboardAiCompanionComment> page = new Page<>(pageNum, pageSize);
         LambdaQueryWrapper<KeyboardAiCompanionComment> queryWrapper = new LambdaQueryWrapper<>();
         queryWrapper.eq(KeyboardAiCompanionComment::getCompanionId, companionId)
-                .eq(KeyboardAiCompanionComment::getStatus, 1)
+                .eq(KeyboardAiCompanionComment::getStatus, ACTIVE_STATUS)
                 .isNull(KeyboardAiCompanionComment::getParentId)
                 .orderByDesc(KeyboardAiCompanionComment::getCreatedAt);
         IPage<KeyboardAiCompanionComment> entityPage = this.page(page, queryWrapper);
@@ -87,7 +105,7 @@ public class KeyboardAiCompanionCommentServiceImpl extends ServiceImpl<KeyboardA
         Page<KeyboardAiCompanionComment> page = new Page<>(pageNum, pageSize);
         LambdaQueryWrapper<KeyboardAiCompanionComment> queryWrapper = new LambdaQueryWrapper<>();
         queryWrapper.eq(KeyboardAiCompanionComment::getCompanionId, companionId)
-                .eq(KeyboardAiCompanionComment::getStatus, 1)
+                .eq(KeyboardAiCompanionComment::getStatus, ACTIVE_STATUS)
                 .isNull(KeyboardAiCompanionComment::getParentId)
                 .orderByDesc(KeyboardAiCompanionComment::getCreatedAt);
         IPage<KeyboardAiCompanionComment> entityPage = this.page(page, queryWrapper);
@@ -105,7 +123,7 @@ public class KeyboardAiCompanionCommentServiceImpl extends ServiceImpl<KeyboardA
             // 查询所有回复
             LambdaQueryWrapper<KeyboardAiCompanionComment> replyWrapper = new LambdaQueryWrapper<>();
             replyWrapper.in(KeyboardAiCompanionComment::getRootId, topCommentIds)
-                    .eq(KeyboardAiCompanionComment::getStatus, 1)
+                    .eq(KeyboardAiCompanionComment::getStatus, ACTIVE_STATUS)
                     .orderByAsc(KeyboardAiCompanionComment::getCreatedAt);
             allReplies = this.list(replyWrapper);
 
@@ -121,7 +139,7 @@ public class KeyboardAiCompanionCommentServiceImpl extends ServiceImpl<KeyboardA
             repliesMap = repliesMap.entrySet().stream()
                     .collect(Collectors.toMap(
                             Map.Entry::getKey,
-                            e -> e.getValue().stream().limit(999).collect(Collectors.toList())
+                            e -> e.getValue().stream().limit(MAX_REPLY_PREVIEW_COUNT).collect(Collectors.toList())
                     ));
         }
 
@@ -178,6 +196,35 @@ public class KeyboardAiCompanionCommentServiceImpl extends ServiceImpl<KeyboardA
         });
     }
 
+    private KeyboardAiCompanionComment getActiveComment(Long commentId) {
+        KeyboardAiCompanionComment comment = this.getById(commentId);
+        if (comment == null || comment.getStatus() == null || comment.getStatus() != ACTIVE_STATUS) {
+            throw new BusinessException(ErrorCode.COMMENT_NOT_FOUND);
+        }
+        return comment;
+    }
+
+    private void validateDeletePermission(Long userId, Long ownerId) {
+        if (!userId.equals(ownerId)) {
+            throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
+        }
+    }
+
+    private void softDeleteComment(Long commentId) {
+        KeyboardAiCompanionComment updateEntity = new KeyboardAiCompanionComment();
+        updateEntity.setStatus(DELETED_STATUS);
+        updateEntity.setUpdatedAt(new Date());
+
+        LambdaUpdateWrapper<KeyboardAiCompanionComment> updateWrapper = new LambdaUpdateWrapper<>();
+        updateWrapper.eq(KeyboardAiCompanionComment::getId, commentId)
+                .eq(KeyboardAiCompanionComment::getStatus, ACTIVE_STATUS);
+
+        boolean updated = this.update(updateEntity, updateWrapper);
+        if (!updated) {
+            throw new BusinessException(ErrorCode.OPERATION_ERROR, "删除评论失败");
+        }
+    }
+
     /**
      * 将评论实体转换为VO
      */
@@ -201,6 +248,7 @@ public class KeyboardAiCompanionCommentServiceImpl extends ServiceImpl<KeyboardA
         // 填充用户信息
         KeyboardUser user = userMap.get(entity.getUserId());
         if (user != null) {
+            vo.setUserUid(user.getUid());
             vo.setUserName(user.getNickName());
             vo.setUserAvatar(user.getAvatarUrl());
         }