diff --git a/webui/src/components/ParameterForm.vue b/webui/src/components/ParameterForm.vue
index 8a9dadb..8d9d466 100644
--- a/webui/src/components/ParameterForm.vue
+++ b/webui/src/components/ParameterForm.vue
@@ -199,7 +199,15 @@
                     </q-input>
                   </div>
                 </div>
-                <div class="row q-col-gutter-md q-mt-sm">
+                <!-- 雷电流概率密度系数设置开关 -->
+                <div class="q-mt-md">
+                  <q-toggle
+                    v-model="showIpCoefficients"
+                    label="设置雷电流概率密度系数"
+                    color="primary"
+                  />
+                </div>
+                <div class="row q-col-gutter-md q-mt-sm" v-if="showIpCoefficients">
                   <div class="col-6">
                     <q-input
                       v-model="params.advance.Ip_a"
@@ -387,6 +395,8 @@ const result = ref<{ tripping_rate: number; n_sf_phases: number[]; message: stri
 const error = ref<string | null>(null)
 const logRef = ref<InstanceType<typeof LogComponent> | null>(null)
 const fileInput = ref<HTMLInputElement | null>(null)
+// 雷电流概率密度系数设置开关
+const showIpCoefficients = ref(false)
 
 const voltageOptions = [
   '110kV', '220kV', '330kV', '500kV', '750kV','1000kV',
@@ -410,6 +420,18 @@ watch(
   { immediate: true }
 )
 
+// 监听雷电流概率密度系数开关
+watch(
+  showIpCoefficients,
+  (show) => {
+    if (!show) {
+      // 关闭时重置为 -1（使用标准参数）
+      params.advance.Ip_a = -1
+      params.advance.Ip_b = -1
+    }
+  }
+)
+
 // 雷暴日与地闪密度相互转换，公式：ng = 0.023 * td^3
 // 标志位避免循环更新
 let isUpdatingFromWatch = false