diff --git a/webui/src/components/ParameterForm.vue b/webui/src/components/ParameterForm.vue
index d03f5da..2e0ec8e 100644
--- a/webui/src/components/ParameterForm.vue
+++ b/webui/src/components/ParameterForm.vue
@@ -2,16 +2,20 @@
   <q-layout view="lHh lpr lFf">
       <q-header elevated class="bg-indigo-600 text-white">
         <q-toolbar>
-          <q-toolbar-title>
+          <q-toolbar-title class="q-py-sm">
             <div class="flex items-center gap-2">
               <q-icon name="flash_on" size="md" />
               <span class="text-xl font-bold">EGM 输电线路绕击跳闸率计算</span>
             </div>
+            <div v-if="currentFilePath" class="text-sm truncate max-w-2xl bg-white text-green-700 px-2 py-0.5 rounded mt-1" :title="currentFilePath">
+              {{ currentFilePath }}
+            </div>
           </q-toolbar-title>
         </q-toolbar>
       </q-header>
 
       <q-page-container>
+        
         <q-page class="q-pa-md">
           <div class="max-w-4xl mx-auto">
             <!-- 基本参数 -->
@@ -342,7 +346,7 @@
               />
             </div>
 
-            <!-- 隐藏的文件输入 -->
+            <!-- 隐藏的文件输入（开发模式备用） -->
             <input
               ref="fileInput"
               type="file"
@@ -441,6 +445,8 @@ const error = ref<string | null>(null)
 const logRef = ref<InstanceType<typeof LogComponent> | null>(null)
 const animationRef = ref<InstanceType<typeof Animation> | null>(null)
 const fileInput = ref<HTMLInputElement | null>(null)
+// 当前打开的文件路径
+const currentFilePath = ref<string>('')
 // 雷电流概率密度系数设置开关
 const showIpCoefficients = ref(false)
 // 50%击穿电压设置开关
@@ -582,6 +588,16 @@ const calculate = async () => {
     }
   }
 
+  // 验证50%击穿电压
+  if (showU50.value) {
+    const u50 = Number(params.advance.u_50)
+    if (u50 < 1000) {
+      error.value = '请检查参数："50%击穿电压 U_50"的值应该大于等于 1000 kV'
+      logRef.value?.addLog('error', '请检查参数："50%击穿电压 U_50"的值应该大于等于 1000 kV')
+      return
+    }
+  }
+
   calculating.value = true
   result.value = null
   error.value = null
@@ -771,12 +787,44 @@ const exportConfig = async () => {
   }
 }
 
-// 导入配置 - 触发文件选择
-const importConfig = () => {
-  fileInput.value?.click()
+// 导入配置 - 调用后端文件对话框
+const importConfig = async () => {
+  try {
+    if (window.pywebview) {
+      const response = await window.pywebview.api.import_config()
+      if (response.success && response.params) {
+        // 合并导入的参数到当前参数
+        if (response.params.parameter) {
+          Object.assign(params.parameter, response.params.parameter)
+        }
+        if (response.params.advance) {
+          Object.assign(params.advance, response.params.advance)
+        }
+        if (response.params.optional) {
+          Object.assign(params.optional, response.params.optional)
+        }
+        
+        // 显示完整文件路径
+        currentFilePath.value = response.file_path || ''
+        
+        logRef.value?.addLog('info', `成功导入配置: ${response.file_path}`)
+        result.value = null
+        error.value = null
+      } else if (!response.success && response.message !== '用户取消了选择') {
+        error.value = response.message || '导入失败'
+        logRef.value?.addLog('error', response.message || '导入失败')
+      }
+    } else {
+      // 开发模式下使用 HTML 文件输入
+      fileInput.value?.click()
+    }
+  } catch (e: any) {
+    error.value = e.message || '导入失败'
+    logRef.value?.addLog('error', e.message || '导入失败')
+  }
 }
 
-// 处理文件选择
+// 处理文件选择（开发模式备用）
 const handleFileSelect = async (event: Event) => {
   const input = event.target as HTMLInputElement
   const file = input.files?.[0]
@@ -797,6 +845,8 @@ const handleFileSelect = async (event: Event) => {
       Object.assign(params.optional, importedParams.optional)
     }
     
+    currentFilePath.value = file.name
+    
     logRef.value?.addLog('info', `成功导入配置: ${file.name}`)
     result.value = null
     error.value = null
@@ -815,6 +865,7 @@ declare global {
     pywebview?: {
       api: {
         calculate: (params: AllParameters) => Promise<any>
+        import_config: () => Promise<any>
         export_config: (params: AllParameters) => Promise<any>
         export_log: (logText: string) => Promise<any>
       }
diff --git a/webview_app.py b/webview_app.py
index d719bd4..30754fd 100644
--- a/webview_app.py
+++ b/webview_app.py
@@ -9,6 +9,7 @@ import json
 import math
 import threading
 import queue
+import tomllib
 from pathlib import Path
 from typing import Dict, Any, List
 from datetime import datetime
@@ -524,6 +525,46 @@ class EGMWebApp:
                 "message": f"保存失败: {str(e)}"
             }
 
+    def import_config(self) -> Dict[str, Any]:
+        """
+        导入配置从 TOML 文件，弹出打开对话框
+
+        Returns:
+            包含解析后的参数和文件路径的字典
+        """
+        try:
+            # 打开文件选择对话框
+            result = self.window.create_file_dialog(
+                webview.OPEN_DIALOG,
+                directory='',
+                file_types=('TOML Files (*.toml)', 'All files (*.*)')
+            )
+            
+            if result and len(result) > 0:
+                file_path = result[0]
+                
+                # 读取并解析 TOML 文件
+                with open(file_path, 'rb') as f:
+                    toml_data = tomllib.load(f)
+                
+                return {
+                    "success": True,
+                    "message": f"成功导入配置",
+                    "file_path": file_path,
+                    "params": toml_data
+                }
+            else:
+                return {
+                    "success": False,
+                    "message": "用户取消了选择"
+                }
+        except Exception as e:
+            logger.error(f"导入配置失败: {str(e)}")
+            return {
+                "success": False,
+                "message": f"导入失败: {str(e)}"
+            }
+
     def get_default_config(self) -> Dict[str, Any]:
         """
         获取默认配置