diff --git a/FrmDiameterQuery.cs b/FrmDiameterQuery.cs
index 35b04cc..2b86a3b 100644
--- a/FrmDiameterQuery.cs
+++ b/FrmDiameterQuery.cs
@@ -50,6 +50,7 @@
         /// <param name="e"></param>
         private void FrmDiameterSel_Load(object sender, EventArgs e)
         {
+            comboBoxEx1.Items.Clear();
             for (int i = 0; i < globeControl1.Globe.Layers.Count; i++)//获取树节点后中所有的layer图层
             {
                 GSOLayer layer = globeControl1.Globe.Layers[i];
@@ -58,13 +59,13 @@
                     string name = layer.Name;
                     if (layer.Type == EnumLayerType.FeatureLayer && !name.Contains("\\") && !name.Contains("施工"))
                     {
-                        if (name.EndsWith("管线"))
+                        if (name.EndsWith("管线") && name != "供电管线" && name != "电信管线")  // 消防、污水、供电、给水、电信、雨水，供电和电信表没有“管径”列
                             comboBoxEx1.Items.Add(name);
                     }
                 }
             }
 
-           
+
             value = comboBoxEx2.Location.X - textBoxX2.Location.X;
 
             textBoxX2.Visible = false;