diff --git a/SicRT/Equipments/AutoTransfer.cs b/SicRT/Equipments/AutoTransfer.cs
index d392636b..61abd337 100644
--- a/SicRT/Equipments/AutoTransfer.cs
+++ b/SicRT/Equipments/AutoTransfer.cs
@@ -1036,6 +1036,20 @@ namespace SicRT.Modules
                 return Result.FAIL;
             }
 
+            //Buffer第一层不能有PM2的Tray
+            if(_buffer.HasTray(0) && _buffer.GetWaferInfo(0).TrayOriginSlot % 2 == 1)
+            {
+                EV.PostWarningLog("Scheduler", "the one floor in buffer has PM2's tray!can not start job!");
+                return Result.FAIL;
+            }
+
+            //Buffer第二层不能有PM1的Tray
+            if (_buffer.HasTray(1) && _buffer.GetWaferInfo(1).TrayOriginSlot % 2 == 0)
+            {
+                EV.PostWarningLog("Scheduler", "the two floor in buffer has PM1's tray!can not start job!");
+                return Result.FAIL;
+            }
+
             return Result.RUN;
         }