diff --git a/src/MaaWpfGui/ViewModels/UserControl/TaskQueue/InfrastSettingsUserControlModel.cs b/src/MaaWpfGui/ViewModels/UserControl/TaskQueue/InfrastSettingsUserControlModel.cs
index 0d5d73c24c..ac13bb5a96 100644
--- a/src/MaaWpfGui/ViewModels/UserControl/TaskQueue/InfrastSettingsUserControlModel.cs
+++ b/src/MaaWpfGui/ViewModels/UserControl/TaskQueue/InfrastSettingsUserControlModel.cs
@@ -605,6 +605,22 @@ public class InfrastSettingsUserControlModel : TaskViewModel
         }
 
         var now = DateTime.Now;
+
+        if (CustomInfrastPlanIndex >= CustomInfrastPlanInfoList.Count || CustomInfrastPlanIndex < 0)
+        {
+            CustomInfrastPlanIndex = 0;
+        }
+
+        var currentPlan = CustomInfrastPlanInfoList.First(p => p.Index == CustomInfrastPlanIndex);
+        foreach (var period in currentPlan.PeriodList)
+        {
+            if (TimeLess(period.BeginHour, period.BeginMinute, now.Hour, now.Minute) &&
+                TimeLess(now.Hour, now.Minute, period.EndHour, period.EndMinute))
+            {
+                return; // 当前 index 仍在有效时间内，不需要切换
+            }
+        }
+
         foreach (var plan in CustomInfrastPlanInfoList.Where(
                      plan => plan.PeriodList.Any(
                          period => TimeLess(period.BeginHour, period.BeginMinute, now.Hour, now.Minute) &&
@@ -614,11 +630,6 @@ public class InfrastSettingsUserControlModel : TaskViewModel
             return;
         }
 
-        if (CustomInfrastPlanIndex >= CustomInfrastPlanList.Count || CustomInfrastPlanList.Count < 0)
-        {
-            CustomInfrastPlanIndex = 0;
-        }
-
         return;
 
         static bool TimeLess(int lHour, int lMin, int rHour, int rMin) => (lHour != rHour) ? (lHour < rHour) : (lMin <= rMin);