diff --git a/klp-admin/src/main/java/com/klp/web/controller/system/SysFileCommentController.java b/klp-admin/src/main/java/com/klp/web/controller/system/SysFileCommentController.java
new file mode 100644
index 000000000..af5316ac4
--- /dev/null
+++ b/klp-admin/src/main/java/com/klp/web/controller/system/SysFileCommentController.java
@@ -0,0 +1,50 @@
+package com.klp.web.controller.system;
+
+import java.util.List;
+
+import lombok.RequiredArgsConstructor;
+import javax.validation.constraints.*;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.validation.annotation.Validated;
+import com.klp.common.annotation.RepeatSubmit;
+import com.klp.common.annotation.Log;
+import com.klp.common.core.controller.BaseController;
+import com.klp.common.core.domain.R;
+import com.klp.common.core.validate.AddGroup;
+import com.klp.common.enums.BusinessType;
+import com.klp.system.domain.vo.SysFileCommentVo;
+import com.klp.system.domain.bo.SysFileCommentBo;
+import com.klp.system.service.ISysFileCommentService;
+
+/**
+ * 文件评论
+ *
+ * @author klp
+ * @date 2026-07-04
+ */
+@Validated
+@RequiredArgsConstructor
+@RestController
+@RequestMapping("/system/file/comment")
+public class SysFileCommentController extends BaseController {
+
+    private final ISysFileCommentService iSysFileCommentService;
+
+    /**
+     * 查询文件评论列表
+     */
+    @GetMapping("/list/{fileId}")
+    public R<List<SysFileCommentVo>> list(@NotNull(message = "文件ID不能为空") @PathVariable Long fileId) {
+        return R.ok(iSysFileCommentService.queryListByFileId(fileId));
+    }
+
+    /**
+     * 新增文件评论
+     */
+    @Log(title = "文件评论", businessType = BusinessType.INSERT)
+    @RepeatSubmit()
+    @PostMapping()
+    public R<Void> add(@Validated(AddGroup.class) @RequestBody SysFileCommentBo bo) {
+        return toAjax(iSysFileCommentService.insertByBo(bo));
+    }
+}
diff --git a/klp-system/src/main/java/com/klp/system/domain/SysFileComment.java b/klp-system/src/main/java/com/klp/system/domain/SysFileComment.java
new file mode 100644
index 000000000..e24ca2a2a
--- /dev/null
+++ b/klp-system/src/main/java/com/klp/system/domain/SysFileComment.java
@@ -0,0 +1,40 @@
+package com.klp.system.domain;
+
+import com.baomidou.mybatisplus.annotation.*;
+import com.klp.common.core.domain.BaseEntity;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+
+/**
+ * 文件评论对象 sys_file_comment
+ *
+ * @author klp
+ * @date 2026-07-04
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+@TableName("sys_file_comment")
+public class SysFileComment extends BaseEntity {
+
+    private static final long serialVersionUID=1L;
+
+    /**
+     * 主键ID
+     */
+    @TableId(value = "comment_id")
+    private Long commentId;
+    /**
+     * 关联文件ID
+     */
+    private Long fileId;
+    /**
+     * 评论内容
+     */
+    private String content;
+    /**
+     * 所属部门
+     */
+    private String dept;
+
+}
diff --git a/klp-system/src/main/java/com/klp/system/domain/bo/SysFileCommentBo.java b/klp-system/src/main/java/com/klp/system/domain/bo/SysFileCommentBo.java
new file mode 100644
index 000000000..ee26751cb
--- /dev/null
+++ b/klp-system/src/main/java/com/klp/system/domain/bo/SysFileCommentBo.java
@@ -0,0 +1,42 @@
+package com.klp.system.domain.bo;
+
+import com.klp.common.core.domain.BaseEntity;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import javax.validation.constraints.*;
+
+
+/**
+ * 文件评论业务对象 sys_file_comment
+ *
+ * @author klp
+ * @date 2026-07-04
+ */
+
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class SysFileCommentBo extends BaseEntity {
+
+    /**
+     * 主键ID
+     */
+    private Long commentId;
+
+    /**
+     * 关联文件ID
+     */
+    @NotNull(message = "文件ID不能为空")
+    private Long fileId;
+
+    /**
+     * 评论内容
+     */
+    @NotBlank(message = "评论内容不能为空")
+    private String content;
+
+    /**
+     * 所属部门
+     */
+    private String dept;
+
+}
diff --git a/klp-system/src/main/java/com/klp/system/domain/vo/SysFileCommentVo.java b/klp-system/src/main/java/com/klp/system/domain/vo/SysFileCommentVo.java
new file mode 100644
index 000000000..aedf32de0
--- /dev/null
+++ b/klp-system/src/main/java/com/klp/system/domain/vo/SysFileCommentVo.java
@@ -0,0 +1,40 @@
+package com.klp.system.domain.vo;
+
+import com.alibaba.excel.annotation.ExcelIgnoreUnannotated;
+import com.klp.common.core.domain.BaseEntity;
+import lombok.Data;
+
+
+/**
+ * 文件评论视图对象 sys_file_comment
+ *
+ * @author klp
+ * @date 2026-07-04
+ */
+@Data
+@ExcelIgnoreUnannotated
+public class SysFileCommentVo extends BaseEntity {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * 主键ID
+     */
+    private Long commentId;
+
+    /**
+     * 关联文件ID
+     */
+    private Long fileId;
+
+    /**
+     * 评论内容
+     */
+    private String content;
+
+    /**
+     * 所属部门
+     */
+    private String dept;
+
+}
diff --git a/klp-system/src/main/java/com/klp/system/mapper/SysFileCommentMapper.java b/klp-system/src/main/java/com/klp/system/mapper/SysFileCommentMapper.java
new file mode 100644
index 000000000..81e1e5552
--- /dev/null
+++ b/klp-system/src/main/java/com/klp/system/mapper/SysFileCommentMapper.java
@@ -0,0 +1,15 @@
+package com.klp.system.mapper;
+
+import com.klp.system.domain.SysFileComment;
+import com.klp.system.domain.vo.SysFileCommentVo;
+import com.klp.common.core.mapper.BaseMapperPlus;
+
+/**
+ * 文件评论Mapper接口
+ *
+ * @author klp
+ * @date 2026-07-04
+ */
+public interface SysFileCommentMapper extends BaseMapperPlus<SysFileCommentMapper, SysFileComment, SysFileCommentVo> {
+
+}
diff --git a/klp-system/src/main/java/com/klp/system/service/ISysFileCommentService.java b/klp-system/src/main/java/com/klp/system/service/ISysFileCommentService.java
new file mode 100644
index 000000000..5a14b997d
--- /dev/null
+++ b/klp-system/src/main/java/com/klp/system/service/ISysFileCommentService.java
@@ -0,0 +1,25 @@
+package com.klp.system.service;
+
+import com.klp.system.domain.vo.SysFileCommentVo;
+import com.klp.system.domain.bo.SysFileCommentBo;
+
+import java.util.List;
+
+/**
+ * 文件评论Service接口
+ *
+ * @author klp
+ * @date 2026-07-04
+ */
+public interface ISysFileCommentService {
+
+    /**
+     * 查询文件评论列表
+     */
+    List<SysFileCommentVo> queryListByFileId(Long fileId);
+
+    /**
+     * 新增文件评论
+     */
+    Boolean insertByBo(SysFileCommentBo bo);
+}
diff --git a/klp-system/src/main/java/com/klp/system/service/impl/SysFileCommentServiceImpl.java b/klp-system/src/main/java/com/klp/system/service/impl/SysFileCommentServiceImpl.java
new file mode 100644
index 000000000..0eece3c44
--- /dev/null
+++ b/klp-system/src/main/java/com/klp/system/service/impl/SysFileCommentServiceImpl.java
@@ -0,0 +1,50 @@
+package com.klp.system.service.impl;
+
+import cn.hutool.core.bean.BeanUtil;
+import com.klp.common.helper.LoginHelper;
+import com.klp.system.domain.bo.SysFileCommentBo;
+import com.klp.system.domain.vo.SysFileCommentVo;
+import com.klp.system.domain.SysFileComment;
+import com.klp.system.mapper.SysFileCommentMapper;
+import com.klp.system.service.ISysFileCommentService;
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.core.toolkit.Wrappers;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+/**
+ * 文件评论Service业务层处理
+ *
+ * @author klp
+ * @date 2026-07-04
+ */
+@RequiredArgsConstructor
+@Service
+public class SysFileCommentServiceImpl implements ISysFileCommentService {
+
+    private final SysFileCommentMapper baseMapper;
+
+    /**
+     * 查询文件评论列表（按时间升序）
+     */
+    @Override
+    public List<SysFileCommentVo> queryListByFileId(Long fileId) {
+        LambdaQueryWrapper<SysFileComment> lqw = Wrappers.lambdaQuery();
+        lqw.eq(SysFileComment::getFileId, fileId);
+        lqw.orderByAsc(SysFileComment::getCreateTime);
+        return baseMapper.selectVoList(lqw);
+    }
+
+    /**
+     * 新增文件评论
+     */
+    @Override
+    public Boolean insertByBo(SysFileCommentBo bo) {
+        SysFileComment add = BeanUtil.toBean(bo, SysFileComment.class);
+        // 自动填充部门和评论人
+        add.setDept(LoginHelper.getLoginUser().getDeptName());
+        return baseMapper.insert(add) > 0;
+    }
+}
diff --git a/klp-system/src/main/resources/mapper/system/SysFileCommentMapper.xml b/klp-system/src/main/resources/mapper/system/SysFileCommentMapper.xml
new file mode 100644
index 000000000..bdd9284ba
--- /dev/null
+++ b/klp-system/src/main/resources/mapper/system/SysFileCommentMapper.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.klp.system.mapper.SysFileCommentMapper">
+
+    <resultMap type="com.klp.system.domain.SysFileComment" id="SysFileCommentResult">
+        <result property="commentId" column="comment_id"/>
+        <result property="fileId" column="file_id"/>
+        <result property="content" column="content"/>
+        <result property="dept" column="dept"/>
+        <result property="createBy" column="create_by"/>
+        <result property="createTime" column="create_time"/>
+    </resultMap>
+
+</mapper>
diff --git a/klp-ui/src/api/system/fileComment.js b/klp-ui/src/api/system/fileComment.js
new file mode 100644
index 000000000..bc33663be
--- /dev/null
+++ b/klp-ui/src/api/system/fileComment.js
@@ -0,0 +1,18 @@
+import request from '@/utils/request'
+
+// 查询文件评论列表
+export function listFileComment(fileId) {
+  return request({
+    url: '/system/file/comment/list/' + fileId,
+    method: 'get'
+  })
+}
+
+// 新增文件评论
+export function addFileComment(data) {
+  return request({
+    url: '/system/file/comment',
+    method: 'post',
+    data: data
+  })
+}
diff --git a/klp-ui/src/views/system/file/all.vue b/klp-ui/src/views/system/file/all.vue
index 6e66e7ed7..ffa39af76 100644
--- a/klp-ui/src/views/system/file/all.vue
+++ b/klp-ui/src/views/system/file/all.vue
@@ -192,6 +192,36 @@
               <span>{{ selectedFile.createBy }}</span>
               <span>{{ parseTime(selectedFile.createTime) }}</span>
             </div>
+            <div class="preview-comment">
+              <div class="comment-bar" @click="commentExpanded = !commentExpanded">
+                <span><i class="el-icon-chat-dot-round"></i> 评论 ({{ comments.length }})</span>
+                <span class="comment-toggle">{{ commentExpanded ? '收起' : '展开' }} <i :class="commentExpanded ? 'el-icon-arrow-up' : 'el-icon-arrow-down'"></i></span>
+              </div>
+              <div v-show="commentExpanded" class="comment-body">
+                <div v-if="commentLoading" class="comment-hint"><i class="el-icon-loading"></i> 加载中...</div>
+                <div v-else-if="comments.length === 0" class="comment-hint comment-empty">暂无评论</div>
+                <div v-else class="comment-list">
+                  <div v-for="item in comments" :key="item.commentId" class="comment-item">
+                    <div class="comment-meta">
+                      <span class="comment-dept">{{ item.dept }}</span>
+                      <span class="comment-user">{{ item.createBy }}</span>
+                      <span class="comment-time">{{ parseTime(item.createTime) }}</span>
+                    </div>
+                    <div class="comment-text">{{ item.content }}</div>
+                  </div>
+                </div>
+                <div class="comment-input-area">
+                  <el-input
+                    v-model="commentInput"
+                    type="textarea"
+                    :rows="2"
+                    placeholder="输入评论..."
+                    resize="none"
+                  />
+                  <el-button type="primary" size="mini" @click="handleAddComment" :disabled="!commentInput.trim()" style="margin-top: 6px;">发送</el-button>
+                </div>
+              </div>
+            </div>
             <div class="preview-content">
               <ImagePreview v-if="fileTypeCategory === 'image'" :src="selectedFile.filePath" />
               <PdfPreview v-else-if="fileTypeCategory === 'pdf'" :src="selectedFile.filePath" />
@@ -298,6 +328,7 @@
 
 <script>
 import { listFile, getFile, addFile, updateFile, delFile, exportFile, listVisibleUser, addVisibleUser, delVisibleUser, listVisibleUserByFileId, listRelatedToMe, incrementView } from '@/api/system/file'
+import { listFileComment, addFileComment } from '@/api/system/fileComment'
 import { getToken } from '@/utils/auth'
 import UserSelect from '@/components/KLPService/UserSelect/index'
 import ImagePreview from '@/components/FilePreview/preview/image/index.vue'
@@ -397,6 +428,11 @@ export default {
       infoVisible: false,
       infoTitle: '',
       infoFile: null,
+      // 评论
+      comments: [],
+      commentExpanded: false,
+      commentInput: '',
+      commentLoading: false,
       // 拖拽调节宽度
       leftPanelWidth: '40%',
       isDragging: false,
@@ -422,6 +458,16 @@ export default {
   created() {
     this.getList()
   },
+  watch: {
+    selectedFile(val) {
+      if (val) {
+        this.loadComments()
+      } else {
+        this.comments = []
+        this.commentExpanded = false
+      }
+    }
+  },
   methods: {
     /** 切换tab */
     handleTabClick(tab) {
@@ -722,6 +768,25 @@ export default {
         window.open(row.filePath, '_blank')
       }
     },
+    /** 加载评论列表 */
+    loadComments() {
+      this.commentLoading = true
+      listFileComment(this.selectedFile.fileId).then(res => {
+        this.comments = res.data || []
+        this.commentLoading = false
+      }).catch(() => {
+        this.commentLoading = false
+      })
+    },
+    /** 发送评论 */
+    handleAddComment() {
+      const content = this.commentInput.trim()
+      if (!content) return
+      addFileComment({ fileId: this.selectedFile.fileId, content }).then(() => {
+        this.commentInput = ''
+        this.loadComments()
+      })
+    },
     /** 开始拖拽 */
     startResize(e) {
       this.isDragging = true
@@ -894,6 +959,88 @@ export default {
   color: #909399;
 }
 
+.preview-comment {
+  border-bottom: 1px solid #ebeef5;
+}
+
+.comment-bar {
+  padding: 8px 16px;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  cursor: pointer;
+  font-size: 13px;
+  color: #606266;
+  user-select: none;
+}
+
+.comment-bar:hover {
+  background: #f5f7fa;
+}
+
+.comment-toggle {
+  color: #909399;
+  font-size: 12px;
+}
+
+.comment-body {
+  max-height: 260px;
+  overflow-y: auto;
+}
+
+.comment-hint {
+  padding: 16px;
+  text-align: center;
+  color: #909399;
+  font-size: 13px;
+}
+
+.comment-list {
+  padding: 4px 0;
+}
+
+.comment-item {
+  padding: 8px 16px;
+  border-bottom: 1px solid #f2f2f2;
+}
+
+.comment-item:last-child {
+  border-bottom: none;
+}
+
+.comment-meta {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+  font-size: 12px;
+  margin-bottom: 4px;
+}
+
+.comment-dept {
+  color: #409eff;
+  font-weight: 500;
+}
+
+.comment-user {
+  color: #606266;
+}
+
+.comment-time {
+  color: #c0c4cc;
+}
+
+.comment-text {
+  font-size: 13px;
+  color: #303133;
+  line-height: 1.5;
+  word-break: break-all;
+}
+
+.comment-input-area {
+  padding: 8px 16px;
+  border-top: 1px solid #f2f2f2;
+}
+
 .preview-content {
   flex: 1;
   overflow: auto;