diff --git a/MifareOneTool/Form1.cs b/MifareOneTool/Form1.cs
index 9e80eb1..04579d5 100644
--- a/MifareOneTool/Form1.cs
+++ b/MifareOneTool/Form1.cs
@@ -212,6 +212,7 @@ namespace MifareOneTool
                 tabControl1.SelectedIndex = 1;
             }
             //File.Delete("libnfc.conf");//用户COM口一般不常变化
+            checkBoxMultiDev.Checked = Properties.Settings.Default.MultiMode;
             if (Properties.Settings.Default.MultiMode)
             {
                 if (File.Exists("libnfc.conf"))