diff --git a/my-project-backend/src/main/java/com/example/controller/ForumController.java b/my-project-backend/src/main/java/com/example/controller/ForumController.java
index d799956..85f46ae 100644
--- a/my-project-backend/src/main/java/com/example/controller/ForumController.java
+++ b/my-project-backend/src/main/java/com/example/controller/ForumController.java
@@ -2,6 +2,7 @@ package com.example.controller;
 
 import com.example.entity.RestBean;
 import com.example.entity.dto.Interact;
+import com.example.entity.vo.request.AddCommentVO;
 import com.example.entity.vo.request.TopicCreateVO;
 import com.example.entity.vo.request.TopicUpdateVO;
 import com.example.entity.vo.response.*;
@@ -93,4 +94,10 @@ public class ForumController {
         topicService.updateTopic(id, vo);
         return RestBean.success();
     }
+
+    @PostMapping("/add-comment")
+    public RestBean<String> addComment(@Valid @RequestBody AddCommentVO vo,
+                                       @RequestAttribute(Const.ATTR_USER_ID) int id) {
+        return utils.messageHandle(() -> topicService.createComment(vo, id));
+    }
 }
diff --git a/my-project-backend/src/main/java/com/example/entity/dto/TopicComment.java b/my-project-backend/src/main/java/com/example/entity/dto/TopicComment.java
new file mode 100644
index 0000000..b19dc78
--- /dev/null
+++ b/my-project-backend/src/main/java/com/example/entity/dto/TopicComment.java
@@ -0,0 +1,20 @@
+package com.example.entity.dto;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+
+import java.util.Date;
+
+@Data
+@TableName("db_topic_comments")
+public class TopicComment {
+    @TableId(type = IdType.AUTO)
+    Integer id;
+    Integer tid;
+    Integer uid;
+    String content;
+    Date time;
+    Integer quote;
+}
diff --git a/my-project-backend/src/main/java/com/example/entity/vo/request/AddCommentVO.java b/my-project-backend/src/main/java/com/example/entity/vo/request/AddCommentVO.java
new file mode 100644
index 0000000..568521d
--- /dev/null
+++ b/my-project-backend/src/main/java/com/example/entity/vo/request/AddCommentVO.java
@@ -0,0 +1,14 @@
+package com.example.entity.vo.request;
+
+import com.alibaba.fastjson2.JSONObject;
+import jakarta.validation.constraints.Min;
+import lombok.Data;
+
+@Data
+public class AddCommentVO {
+    @Min(1)
+    int tid;
+    String content;
+    @Min(-1)
+    int quote;
+}
diff --git a/my-project-backend/src/main/java/com/example/mapper/TopicCommentMapper.java b/my-project-backend/src/main/java/com/example/mapper/TopicCommentMapper.java
new file mode 100644
index 0000000..d9bb76a
--- /dev/null
+++ b/my-project-backend/src/main/java/com/example/mapper/TopicCommentMapper.java
@@ -0,0 +1,9 @@
+package com.example.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.example.entity.dto.TopicComment;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
+public interface TopicCommentMapper extends BaseMapper<TopicComment> {
+}
diff --git a/my-project-backend/src/main/java/com/example/service/TopicService.java b/my-project-backend/src/main/java/com/example/service/TopicService.java
index 8861713..1107c45 100644
--- a/my-project-backend/src/main/java/com/example/service/TopicService.java
+++ b/my-project-backend/src/main/java/com/example/service/TopicService.java
@@ -4,6 +4,7 @@ import com.baomidou.mybatisplus.extension.service.IService;
 import com.example.entity.dto.Interact;
 import com.example.entity.dto.Topic;
 import com.example.entity.dto.TopicType;
+import com.example.entity.vo.request.AddCommentVO;
 import com.example.entity.vo.request.TopicCreateVO;
 import com.example.entity.vo.request.TopicUpdateVO;
 import com.example.entity.vo.response.TopicPreviewVO;
@@ -21,4 +22,5 @@ public interface TopicService extends IService<Topic> {
     TopicDetailVO getTopic(int tid, int uid);
     void interact(Interact interact, boolean state);
     List<TopicPreviewVO> listCollectTopic(int uid);
+    String createComment(AddCommentVO vo, int uid);
 }
diff --git a/my-project-backend/src/main/java/com/example/service/impl/TopicServiceImpl.java b/my-project-backend/src/main/java/com/example/service/impl/TopicServiceImpl.java
index baddf0b..968aeb7 100644
--- a/my-project-backend/src/main/java/com/example/service/impl/TopicServiceImpl.java
+++ b/my-project-backend/src/main/java/com/example/service/impl/TopicServiceImpl.java
@@ -6,6 +6,7 @@ import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.example.entity.dto.*;
+import com.example.entity.vo.request.AddCommentVO;
 import com.example.entity.vo.request.TopicCreateVO;
 import com.example.entity.vo.request.TopicUpdateVO;
 import com.example.entity.vo.response.TopicDetailVO;
@@ -41,6 +42,9 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
     @Resource
     AccountPrivacyMapper accountPrivacyMapper;
 
+    @Resource
+    TopicCommentMapper commentMapper;
+
     @Resource
     FlowUtils flowUtils;
 
@@ -152,6 +156,19 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
         }
     }
 
+    @Override
+    public String createComment(AddCommentVO vo, int uid) {
+        String key = Const.FORUM_TOPIC_COMMENT_COUNTER + uid;
+        if(!flowUtils.limitPeriodCounterCheck(key, 2, 60))
+            return "发表评论频繁，请稍后再试!";
+        TopicComment comment = new TopicComment();
+        comment.setUid(uid);
+        BeanUtils.copyProperties(vo, comment);
+        comment.setTime(new Date());
+        commentMapper.insert(comment);
+        return null;
+    }
+
     private boolean hasInteract(int tid, int uid, String type){
         String key = tid + ":" + uid;
         if(template.opsForHash().hasKey(type, key))
diff --git a/my-project-backend/src/main/java/com/example/utils/Const.java b/my-project-backend/src/main/java/com/example/utils/Const.java
index 76133a8..d7a065a 100644
--- a/my-project-backend/src/main/java/com/example/utils/Const.java
+++ b/my-project-backend/src/main/java/com/example/utils/Const.java
@@ -26,5 +26,6 @@ public final class Const {
     public final static String FORUM_IMAGE_COUNTER = "image:upload:";
     public final static String FORUM_WEATHER_CACHE = "weather:cache:";
     public final static String FORUM_TOPIC_CREATE_COUNTER = "topic:create:";
+    public final static String FORUM_TOPIC_COMMENT_COUNTER = "topic:comment:";
     public final static String FORUM_TOPIC_PREVIEW_CACHE = "topic:preview:";
 }
diff --git a/my-project-frontend/src/assets/quill.css b/my-project-frontend/src/assets/quill.css
new file mode 100644
index 0000000..89bb073
--- /dev/null
+++ b/my-project-frontend/src/assets/quill.css
@@ -0,0 +1,15 @@
+.ql-toolbar {
+    border-radius: 5px 5px 0 0;
+    border-color: var(--el-border-color) !important;
+}
+.ql-container{
+    border-radius: 0 0 5px 5px;
+    border-color: var(--el-border-color) !important;
+}
+.ql-editor.ql-blank::before{
+    color: grey !important;
+    font-style: normal !important;
+}
+.ql-editor {
+    font-size: 14px;
+}
diff --git a/my-project-frontend/src/components/TopicCommentEditor.vue b/my-project-frontend/src/components/TopicCommentEditor.vue
new file mode 100644
index 0000000..6360a49
--- /dev/null
+++ b/my-project-frontend/src/components/TopicCommentEditor.vue
@@ -0,0 +1,61 @@
+<script setup>
+import {QuillEditor} from "@vueup/vue-quill";
+import '@vueup/vue-quill/dist/vue-quill.snow.css';
+import {post} from "@/net";
+import {reactive, ref} from "vue";
+import {ElMessage} from "element-plus";
+
+const props = defineProps({
+    quote: Number,
+    show: Boolean,
+    tid: String
+})
+const emit = defineEmits(['close'])
+
+const content = ref()
+
+function submitComment() {
+    post('/api/forum/add-comment', {
+        tid: props.tid,
+        content: JSON.stringify(content.value),
+        quote: props.quote
+    }, () => {
+        ElMessage.success('评论成功')
+        emit('close')
+    })
+}
+</script>
+
+<template>
+    <div>
+        <el-drawer :model-value="show"
+                   title="发表回复"
+                   :size="270" direction="btt"
+                   @close="emit('close')"
+                   :show-close="false">
+            <div style="padding: 10px;width: 100%">
+                <div>
+                    <quill-editor style="height: 100px" v-model:content="content"
+                                  placeholder="请发表友善的评论，不要使用脏话骂人，都是大学生素质高一点"/>
+                </div>
+                <div style="margin-top: 10px;text-align: right">
+                    <el-button @click="submitComment" type="success" plain>发表评论</el-button>
+                </div>
+            </div>
+        </el-drawer>
+    </div>
+</template>
+
+<style lang="less" scoped>
+:deep(.el-drawer) {
+    width: 800px;
+    margin: 20px auto;
+    border-radius: 10px;
+}
+:deep(.el-drawer__header) {
+    margin: 0;
+}
+:deep(.el-drawer__body) {
+    padding: 10px;
+}
+</style>
diff --git a/my-project-frontend/src/components/TopicEditor.vue b/my-project-frontend/src/components/TopicEditor.vue
index 41ec637..bbb0c9e 100644
--- a/my-project-frontend/src/components/TopicEditor.vue
+++ b/my-project-frontend/src/components/TopicEditor.vue
@@ -196,19 +196,4 @@ const editorOption = {
 :deep(.el-drawer__header) {
     margin: 0;
 }
-:deep(.ql-toolbar) {
-    border-radius: 5px 5px 0 0;
-    border-color: var(--el-border-color);
-}
-:deep(.ql-container){
-    border-radius: 0 0 5px 5px;
-    border-color: var(--el-border-color);
-}
-:deep(.ql-editor.ql-blank::before){
-    color: grey;
-    font-style: normal;
-}
-:deep(.ql-editor) {
-    font-size: 14px;
-}
 </style>
diff --git a/my-project-frontend/src/main.js b/my-project-frontend/src/main.js
index 97c993f..88e32c3 100644
--- a/my-project-frontend/src/main.js
+++ b/my-project-frontend/src/main.js
@@ -5,6 +5,7 @@ import axios from "axios";
 import { createPinia } from 'pinia'
 
 import 'element-plus/theme-chalk/dark/css-vars.css'
+import '@/assets/quill.css'
 
 axios.defaults.baseURL = 'http://localhost:8080'
 
diff --git a/my-project-frontend/src/views/forum/Forum.vue b/my-project-frontend/src/views/forum/Forum.vue
index 5e10a28..ace59e5 100644
--- a/my-project-frontend/src/views/forum/Forum.vue
+++ b/my-project-frontend/src/views/forum/Forum.vue
@@ -21,6 +21,6 @@ get('/api/forum/types', data => {
                 </keep-alive>
             </transition>
         </router-view>
-        <el-backtop target=".main-content-page .el-scrollbar__wrap" :right="20" :bottom="20"/>
+        <el-backtop target=".main-content-page .el-scrollbar__wrap" :right="20" :bottom="70"/>
     </div>
 </template>
diff --git a/my-project-frontend/src/views/forum/TopicDetail.vue b/my-project-frontend/src/views/forum/TopicDetail.vue
index 3bfc9e7..5110a97 100644
--- a/my-project-frontend/src/views/forum/TopicDetail.vue
+++ b/my-project-frontend/src/views/forum/TopicDetail.vue
@@ -3,7 +3,7 @@ import {useRoute} from "vue-router";
 import {get, post} from "@/net";
 import {computed, reactive, ref} from "vue";
 import axios from "axios";
-import {ArrowLeft, CircleCheck, EditPen, Female, Male, Star} from "@element-plus/icons-vue";
+import {ArrowLeft, CircleCheck, EditPen, Female, Male, Plus, Star} from "@element-plus/icons-vue";
 import { QuillDeltaToHtmlConverter } from 'quill-delta-to-html';
 import {useStore} from "@/store";
 import Card from "@/components/Card.vue";
@@ -12,6 +12,7 @@ import InteractButton from "@/components/InteractButton.vue";
 import {ElMessage} from "element-plus";
 import TopicTag from "@/components/TopicTag.vue";
 import TopicEditor from "@/components/TopicEditor.vue";
+import TopicCommentEditor from "@/components/TopicCommentEditor.vue";
 
 const route = useRoute()
 const store = useStore()
@@ -25,6 +26,11 @@ const topic = reactive({
     comments: []
 })
 const edit = ref(false)
+const comment = reactive({
+    show: false,
+    text: '',
+    quote: -1
+})
 
 function init() {
     get(`/api/forum/topic?tid=${tid}`, data => {
@@ -124,15 +130,43 @@ function updateTopic(editor) {
                     </interact-button>
                 </div>
             </div>
+        </div>
+        <div class="topic-main">
+
         </div>
         <topic-editor :show="edit" @close="edit = false" v-if="topic.data"
                       :default-title="topic.data.title" :default-text="topic.data.content"
                       :default-type="topic.data.type" submit-button="更新帖子内容"
                       :submit="updateTopic"/>
+        <topic-comment-editor :show="comment.show" @close="comment.show = false"
+                              :quote="comment.quote" :tid="tid"/>
+        <div class="add-comment" @click="comment.show = true">
+            <el-icon><Plus /></el-icon>
+        </div>
     </div>
 </template>
 
 <style scoped>
+.add-comment {
+    position: fixed;
+    bottom: 20px;
+    right: 20px;
+    width: 40px;
+    height: 40px;
+    line-height: 45px;
+    font-size: 18px;
+    color: var(--el-color-primary);
+    text-align: center;
+    border-radius: 20px;
+    background: var(--el-bg-color-overlay);
+    box-shadow: var(--el-box-shadow-lighter);
+
+    &:hover {
+        background: var(--el-border-color-extra-light);
+        cursor: pointer;
+    }
+}
+
 .topic-page {
     display: flex;
     flex-direction: column;