diff --git a/webui/src/components/ParameterForm.vue b/webui/src/components/ParameterForm.vue
index b6796da..d46c2b0 100644
--- a/webui/src/components/ParameterForm.vue
+++ b/webui/src/components/ParameterForm.vue
@@ -105,7 +105,7 @@
                 <!-- 导、地线挂点高度 -->
                 <div class="q-mt-md">
                   <div class="text-subtitle2 q-mb-sm">
-                    导、地线挂点垂直距离 (m) - 第一个值为地线挂点高度
+                    导、地线挂点垂直坐标 (m) 
                   </div>
                   <div class="row q-col-gutter-sm">
                     <div class="col" v-for="(h, index) in params.parameter.h_arm" :key="index">
@@ -118,10 +118,10 @@
                       />
                     </div>
                     <div class="col-auto">
-                      <q-btn flat round color="primary" icon="add" @click="addHArm" />
+                      <q-btn flat round color="primary" icon="add" @click="addHArm" :disable="params.parameter.h_arm.length >= 4" />
                     </div>
                     <div class="col-auto">
-                      <q-btn flat round color="negative" icon="remove" @click="removeHArm" :disable="params.parameter.h_arm.length <= 1" />
+                      <q-btn flat round color="negative" icon="remove" @click="removeHArm" :disable="params.parameter.h_arm.length <= 2" />
                     </div>
                   </div>
                 </div>
@@ -129,7 +129,7 @@
                 <!-- 导、地线水平坐标 -->
                 <div class="q-mt-md">
                   <div class="text-subtitle2 q-mb-sm">
-                    导、地线水平坐标 (m)
+                    导、地线挂点水平坐标 (m)
                   </div>
                   <div class="row q-col-gutter-sm">
                     <div class="col" v-for="(x, index) in params.parameter.gc_x" :key="index">
@@ -142,10 +142,10 @@
                       />
                     </div>
                     <div class="col-auto">
-                      <q-btn flat round color="primary" icon="add" @click="addGcX" />
+                      <q-btn flat round color="primary" icon="add" @click="addGcX" :disable="params.parameter.gc_x.length >= 4" />
                     </div>
                     <div class="col-auto">
-                      <q-btn flat round color="negative" icon="remove" @click="removeGcX" :disable="params.parameter.gc_x.length <= 1" />
+                      <q-btn flat round color="negative" icon="remove" @click="removeGcX" :disable="params.parameter.gc_x.length <= 2" />
                     </div>
                   </div>
                 </div>
@@ -357,25 +357,29 @@ const voltageOptions = [
   '±500kV', '±660kV', '±800kV', '±1100kV'
 ]
 
-// 数组操作函数
+// 数组操作函数（最多3条导线，即数组最多4个元素：1地线+3导线）
 const addHArm = () => {
-  const last = params.parameter.h_arm[params.parameter.h_arm.length - 1] || 100
-  params.parameter.h_arm.push(last - 20)
+  if (params.parameter.h_arm.length < 4) {
+    const last = params.parameter.h_arm[params.parameter.h_arm.length - 1] || 100
+    params.parameter.h_arm.push(last - 20)
+  }
 }
 
 const removeHArm = () => {
-  if (params.parameter.h_arm.length > 1) {
+  if (params.parameter.h_arm.length > 2) {
     params.parameter.h_arm.pop()
   }
 }
 
 const addGcX = () => {
-  const last = params.parameter.gc_x[params.parameter.gc_x.length - 1] || 10
-  params.parameter.gc_x.push(last)
+  if (params.parameter.gc_x.length < 4) {
+    const last = params.parameter.gc_x[params.parameter.gc_x.length - 1] || 10
+    params.parameter.gc_x.push(last)
+  }
 }
 
 const removeGcX = () => {
-  if (params.parameter.gc_x.length > 1) {
+  if (params.parameter.gc_x.length > 2) {
     params.parameter.gc_x.pop()
   }
 }