diff --git a/src/models/chat_model.py b/src/models/chat_model.py
index e3a83d1e..43b00aa5 100644
--- a/src/models/chat_model.py
+++ b/src/models/chat_model.py
@@ -31,7 +31,8 @@ class OpenAIBase():
             stream=True,
         )
         for chunk in response:
-            yield chunk.choices[0].delta
+            if len(chunk.choices) > 0:
+                yield chunk.choices[0].delta
 
     def _get_response(self, messages):
         response = self.client.chat.completions.create(
diff --git a/web/src/components/ChatComponent.vue b/web/src/components/ChatComponent.vue
index efd98363..60e61f5d 100644
--- a/web/src/components/ChatComponent.vue
+++ b/web/src/components/ChatComponent.vue
@@ -77,6 +77,7 @@
     <div class="chat-box" :class="{ 'wide-screen': meta.wideScreen, 'font-smaller': meta.fontSize === 'smaller', 'font-larger': meta.fontSize === 'larger' }">
       <MessageComponent
         v-for="message in conv.messages"
+        :message="message"
         :key="message.id"
         :role="message.role"
         :content="message.text"
@@ -87,9 +88,10 @@
         :is-processing="isStreaming"
         :error-message="message.message"
         @retry="retryMessage(message.id)"
+        @retryStoppedMessage="retryStoppedMessage(message.id)"
       >
         <template #refs v-if="message.role=='received' && message.status=='finished'">
-          <RefsComponent :message="message" />
+          <RefsComponent :message="message" :conv="conv" @retry="retryMessage(message.id)" />
         </template>
       </MessageComponent>
     </div>
@@ -100,7 +102,7 @@
           :is-loading="isStreaming"
           :send-button-disabled="!conv.inputText && !isStreaming"
           :auto-size="{ minRows: 2, maxRows: 10 }"
-          @send="sendMessage"
+          @send="handleSendOrStop"
           @keydown="handleKeyDown"
         >
           <template #options-left>
@@ -171,6 +173,9 @@ import {
   BulbOutlined,
   CaretRightOutlined,
   DeploymentUnitOutlined,
+  PauseOutlined,
+  ReloadOutlined,
+  CopyOutlined
 } from '@ant-design/icons-vue'
 import { onClickOutside } from '@vueuse/core'
 import { Marked } from 'marked';
@@ -221,7 +226,7 @@ const meta = reactive(JSON.parse(localStorage.getItem('meta')) || {
   selectedKB: null,
   stream: true,
   summary_title: false,
-  history_round: 5,
+  history_round: 20,
   db_id: null,
   fontSize: 'default',
   wideScreen: false,
@@ -253,6 +258,24 @@ const renderMarkdown = (msg) => {
   }
 }
 
+// 从 message 中获取 history 信息，每个消息都是 {role, content} 的格式
+const getHistory = () => {
+  const history = conv.value.messages.map((msg) => {
+    if (msg.text) {
+      return {
+        role: msg.role === 'sent' ? 'user' : 'assistant',
+        content: msg.text
+      }
+    }
+  }).reduce((acc, cur) => {
+    if (cur) {
+      acc.push(cur)
+    }
+    return acc
+  }, [])
+  return history.slice(-meta.history_round)
+}
+
 const useDatabase = (index) => {
   const selected = opts.databases[index]
   console.log(selected)
@@ -441,18 +464,24 @@ const loadDatabases = () => {
 
 // 新函数用于处理 fetch 请求
 const fetchChatResponse = (user_input, cur_res_id) => {
+  const controller = new AbortController();
+  const signal = controller.signal;
+
+  const params = {
+    query: user_input,
+    history: getHistory(),
+    meta: meta,
+    cur_res_id: cur_res_id,
+  }
+  console.log(params)
+
   fetch('/api/chat/', {
     method: 'POST',
-    body: JSON.stringify({
-      query: user_input,
-      history: conv.value.history,
-      meta: meta,
-      cur_res_id: cur_res_id,
-      thread_id: conv.value.id.toString(),
-    }),
+    body: JSON.stringify(params),
     headers: {
       'Content-Type': 'application/json'
-    }
+    },
+    signal // 添加 signal 用于中断请求
   })
   .then((response) => {
     if (!response.body) throw new Error("ReadableStream not supported.");
@@ -510,13 +539,24 @@ const fetchChatResponse = (user_input, cur_res_id) => {
     readChunk();
   })
   .catch((error) => {
-    console.error(error);
-    updateMessage({
-      id: cur_res_id,
-      status: "error",
-    });
+    if (error.name === 'AbortError') {
+      console.log('Fetch aborted');
+    } else {
+      console.error(error);
+      updateMessage({
+        id: cur_res_id,
+        status: "error",
+      });
+    }
     isStreaming.value = false;
   });
+
+  // 监听 isStreaming 变化，当为 false 时中断请求
+  watch(isStreaming, (newValue) => {
+    if (!newValue) {
+      controller.abort();
+    }
+  });
 }
 
 
@@ -606,6 +646,37 @@ watch(
   { deep: true }
 );
 
+// 处理发送或停止
+const handleSendOrStop = () => {
+  if (isStreaming.value) {
+    // 停止生成
+    isStreaming.value = false;
+    const lastMessage = conv.value.messages[conv.value.messages.length - 1];
+    if (lastMessage) {
+      lastMessage.isStoppedByUser = true;
+      lastMessage.status = 'stopped';
+    }
+  } else {
+    // 发送消息
+    sendMessage();
+  }
+}
+
+// 重试被停止的消息
+const retryStoppedMessage = (id) => {
+  // 找到用户的原始问题
+  const messageIndex = conv.value.messages.findIndex(msg => msg.id === id);
+  if (messageIndex > 0) {
+    const userMessage = conv.value.messages[messageIndex - 1];
+    if (userMessage && userMessage.role === 'sent') {
+      conv.value.inputText = userMessage.text;
+      // 删除被停止的消息，以及所有后面的消息
+      conv.value.messages = conv.value.messages.slice(0, messageIndex-1);
+      // sendMessage();
+    }
+  }
+}
+
 const modelNames = computed(() => configStore.config?.model_names)
 const modelStatus = computed(() => configStore.config?.model_provider_status)
 const customModels = computed(() => configStore.config?.custom_models || [])
@@ -620,6 +691,7 @@ const selectModel = (provider, name) => {
   configStore.setConfigValue('model_provider', provider)
   configStore.setConfigValue('model_name', name)
   message.success(`已切换到模型: ${provider}/${name}`)
+
 }
 </script>
 
diff --git a/web/src/components/MessageComponent.vue b/web/src/components/MessageComponent.vue
index 70c52028..e5b0eca9 100644
--- a/web/src/components/MessageComponent.vue
+++ b/web/src/components/MessageComponent.vue
@@ -41,6 +41,11 @@
       <!-- 消息内容 -->
       <div v-else-if="contentHtml" v-html="contentHtml" class="message-md"></div>
 
+      <div v-if="message.isStoppedByUser" class="retry-hint">
+        你停止生成了本次回答
+        <span class="retry-link" @click="emit('retryStoppedMessage', message.id)">重新编辑问题</span>
+      </div>
+
       <!-- 工具调用 (AgentView特有) -->
       <slot name="tool-calls"></slot>
 
@@ -60,6 +65,10 @@ import { CaretRightOutlined } from '@ant-design/icons-vue';
 
 const props = defineProps({
   // 消息角色：'user'|'assistant'|'sent'|'received'
+  message: {
+    type: Object,
+    required: true
+  },
   role: {
     type: String,
     required: true
@@ -114,7 +123,7 @@ const statusDefination = {
   error: '错误'
 }
 
-const emit = defineEmits(['retry']);
+const emit = defineEmits(['retry', 'retryStoppedMessage']);
 
 // 推理面板展开状态
 const reasoningActiveKey = ref(['show']);
@@ -319,6 +328,35 @@ const isEmptyAndLoading = computed(() => {
   }
 }
 
+.retry-hint {
+  margin-top: 8px;
+  padding: 8px 16px;
+  color: #666;
+  font-size: 14px;
+  text-align: left;
+}
+
+.retry-link {
+  color: #1890ff;
+  cursor: pointer;
+  margin-left: 4px;
+
+  &:hover {
+    text-decoration: underline;
+  }
+}
+
+.ant-btn-icon-only {
+  &:has(.anticon-stop) {
+    background-color: #ff4d4f !important;
+
+    &:hover {
+      background-color: #ff7875 !important;
+    }
+  }
+}
+
+
 .loading-dots {
   display: inline-flex;
   align-items: center;
diff --git a/web/src/components/MessageInputComponent.vue b/web/src/components/MessageInputComponent.vue
index 39744cd0..108ddccc 100644
--- a/web/src/components/MessageInputComponent.vue
+++ b/web/src/components/MessageInputComponent.vue
@@ -15,11 +15,17 @@
         <slot name="options-left"></slot>
       </div>
       <div class="options__right">
-        <a-button @click="handleSend" :disabled="sendButtonDisabled" type="link">
+        <a-tooltip :title="isLoading ? '停止回答' : ''">
+          <a-button
+            @click="handleSendOrStop"
+            :disabled="sendButtonDisabled"
+            type="link"
+          >
           <template #icon>
-            <component :is="getIcon" />
+            <component :is="getIcon" class="send-btn"/>
           </template>
-        </a-button>
+          </a-button>
+        </a-tooltip>
       </div>
     </div>
   </div>
@@ -30,7 +36,8 @@ import { ref, computed, toRefs } from 'vue';
 import {
   SendOutlined,
   ArrowUpOutlined,
-  LoadingOutlined
+  LoadingOutlined,
+  PauseOutlined
 } from '@ant-design/icons-vue';
 
 const props = defineProps({
@@ -74,13 +81,13 @@ const emit = defineEmits(['update:modelValue', 'send', 'keydown']);
 const iconComponents = {
   'SendOutlined': SendOutlined,
   'ArrowUpOutlined': ArrowUpOutlined,
-  'LoadingOutlined': LoadingOutlined
+  'PauseOutlined': PauseOutlined
 };
 
 // 根据传入的图标名动态获取组件
 const getIcon = computed(() => {
   if (props.isLoading) {
-    return LoadingOutlined;
+    return PauseOutlined;
   }
   return iconComponents[props.sendIcon] || ArrowUpOutlined;
 });
@@ -97,7 +104,7 @@ const handleKeyPress = (e) => {
 };
 
 // 处理发送按钮点击
-const handleSend = () => {
+const handleSendOrStop = () => {
   emit('send');
 };
 </script>
@@ -218,6 +225,7 @@ button.ant-btn-icon-only {
   &:hover {
     background-color: var(--main-600);
     box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
+    color: white;
   }
 
   &:active {
diff --git a/web/src/components/RefsComponent.vue b/web/src/components/RefsComponent.vue
index e79504cc..ad6be515 100644
--- a/web/src/components/RefsComponent.vue
+++ b/web/src/components/RefsComponent.vue
@@ -4,7 +4,8 @@
       <!-- <span class="item btn" @click="likeThisResponse(msg)"><LikeOutlined /></span> -->
       <!-- <span class="item btn" @click="dislikeThisResponse(msg)"><DislikeOutlined /></span> -->
       <span class="item"><BulbOutlined /> {{ msg.meta.server_model_name }}</span>
-      <span class="item btn" @click="copyText(msg.text)"><CopyOutlined /></span>
+      <span class="item btn" @click="copyText(msg.text)" title="复制"><CopyOutlined /></span>
+      <span class="item btn" @click="regenerateMessage()" title="重新生成"><ReloadOutlined /></span>
       <span
         class="item btn"
         @click="openSubGraph(msg)"
@@ -107,20 +108,23 @@ import {
   GlobalOutlined,
   FileTextOutlined,
   CopyOutlined,
-  LikeOutlined,
-  DislikeOutlined,
   DeploymentUnitOutlined,
   BulbOutlined,
   FileOutlined,
-  ClockCircleOutlined
+  ClockCircleOutlined,
+  ReloadOutlined,
 } from '@ant-design/icons-vue'
 import GraphContainer from './GraphContainer.vue'  // 导入 GraphContainer 组件
 
+
+const emit = defineEmits(['retry']);
 const props = defineProps({
   message: Object,
+  conv: Object,
 })
 
 const msg = ref(props.message)
+const conv = ref(props.conv)
 
 // 使用 useClipboard 实现复制功能
 const { copy, isSupported } = useClipboard()
@@ -210,6 +214,11 @@ const formatDate = (timestamp) => {
 const getPercent = (value) => {
   return parseFloat((value * 100).toFixed(2))
 }
+
+// 添加重新生成方法
+const regenerateMessage = () => {
+  emit('retry')
+}
 </script>
 
 <style lang="less" scoped>