diff --git a/src/layout/components/TopBar/aiAssistant.vue b/src/layout/components/TopBar/aiAssistant.vue
index 1f6e807..23d4082 100644
--- a/src/layout/components/TopBar/aiAssistant.vue
+++ b/src/layout/components/TopBar/aiAssistant.vue
@@ -23,13 +23,31 @@
               <Minus />
             </el-icon>
 
-          <el-icon class="ai-float-close" @click="close">
-            <Close/>
-          </el-icon>
+            <el-icon class="ai-float-close" @click="close">
+              <Close/>
+            </el-icon>
           </div>
         </div>
         <div class="ai-float-form-list ai-float-scroll">
-          <div class="ai-float-welcome">👋 欢迎使用AI智能填报助手</div>
+          <div class="form-list-top">
+            <div class="ai-float-welcome">👋 欢迎使用AI智能填报助手</div>
+            <div class="ai-model-selector">
+              <el-select
+                v-model="selectedModelId"
+                placeholder="选择AI模型"
+                size="small"
+                style="width: 120px"
+                :disabled="aiThinking"
+              >
+                <el-option
+                  v-for="model in aiModelList"
+                  :key="model.modelId"
+                  :label="model.modelName"
+                  :value="model.modelId"
+                />
+              </el-select>
+            </div>
+          </div>
           <div class="form-list-title">请选择需要填报的表单：</div>
           <!-- 加载状态 -->
           <div v-if="formsLoading" class="loading-container">
@@ -330,7 +348,7 @@ const selectForm = async (aiFormSetting: AiFormSettingVO) => {
 }
 
 const resetAiAssistant = () =>{
-   chatList.value = [];
+  chatList.value = [];
 }
 
 // function selectForm(aiFormSetting: AiFormSettingVO) {
@@ -449,7 +467,7 @@ const handleSend = async (selectedText?: string) => {
       naturalLanguageQuery: userMsg,
       formSettingId: selectedFormSettingId.value,
       formSettingDetailList: aiFormSettingDetailListMap.value[selectedFormSettingId.value],
-      modelId: 1,
+      modelId: selectedModelId.value,
       platformId: 1
     }
 
@@ -950,6 +968,15 @@ const showMore = ref(false)
 const inputValue = ref('')
 const canSend = computed(() => selectedFormSettingId.value && inputValue.value.trim().length > 0)
 
+// AI模型相关数据
+const aiModelList = ref([
+  { modelId: 1, modelName: 'GPT-3.5' },
+  { modelId: 2, modelName: 'GPT-4' },
+  { modelId: 3, modelName: 'Claude-3' },
+  { modelId: 4, modelName: 'Gemini-Pro' }
+])
+const selectedModelId = ref(1) // 默认选择第一个模型
+
 // 新增：更多弹窗过滤输入
 const moreFilterText = ref('')
 const filteredForms = computed(() =>
@@ -1289,28 +1316,46 @@ function toggleSize() {
   top: 0;
   position: fixed;
   z-index: 7005;
-
-  // 修复动态样式
-  &.size-custom {
-    right: v-bind('isCustomPosition ? "auto" : "0"');
-    left: v-bind('isCustomPosition ? windowPosition.x + "px" : "auto"');
-    top: v-bind('isCustomPosition ? windowPosition.y + "px" : "0"');
-    width: v-bind('windowSize.width');
-    height: v-bind('windowSize.height');
-  }
-
-  &.size-minimized {
-    right: auto !important;
-    left: v-bind('windowPosition.x + "px"') !important;
-    top: v-bind('windowPosition.y + "px"') !important;
-    width: v-bind('windowSize.width + "px"') !important;
-    height: v-bind('windowSize.height + "px"') !important;
-    border-radius: 20px;
-    padding: 0;
-    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
-  }
 }
 
+/* 确保Element Plus下拉列表显示在浮窗之上 */
+::deep(.el-select-dropdown) {
+  z-index: 9000 !important;
+}
+::deep(.el-popper) {
+  z-index: 9000 !important;
+}
+::deep(.ai-select-popper) {
+  z-index: 9500 !important;
+}
+::deep(.el-overlay) {
+  z-index: 8000 !important;
+}
+::deep(.el-overlay .el-dialog) {
+  z-index: 8001 !important;
+}
+
+// 修复动态样式
+&.size-custom {
+  right: v-bind('isCustomPosition ? "auto" : "0"');
+  left: v-bind('isCustomPosition ? windowPosition.x + "px" : "auto"');
+  top: v-bind('isCustomPosition ? windowPosition.y + "px" : "0"');
+  width: v-bind('windowSize.width');
+  height: v-bind('windowSize.height');
+}
+
+&.size-minimized {
+  right: auto !important;
+  left: v-bind('windowPosition.x + "px"') !important;
+  top: v-bind('windowPosition.y + "px"') !important;
+  width: v-bind('windowSize.width + "px"') !important;
+  height: v-bind('windowSize.height + "px"') !important;
+  border-radius: 20px;
+  padding: 0;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+}
+
+
 // 新增：最小化状态下隐藏内容
 .size-minimized .ai-float-main,
 .size-minimized .ai-float-form-list,
@@ -1464,10 +1509,25 @@ function toggleSize() {
   overflow-y: auto;
 }
 
+.form-list-top {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 8px;
+}
+
+.form-list-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 8px;
+}
+
 .form-list-title {
   font-size: 15px;
-  margin-bottom: 8px;
   color: #333;
+  margin: 0;
+  margin-bottom:10px;
 }
 
 .form-list {
@@ -1541,6 +1601,11 @@ function toggleSize() {
   flex: 1 1 auto;
 }
 
+.ai-model-selector {
+  flex-shrink: 0;
+  z-index:8000;
+}
+
 .ai-float-send-btn {
   margin-bottom: 4px;
 }