Middle sheet capable of preventing local penetration

The utility model discloses a middle sheet for preventing local penetration, which comprises a bed, a middle sheet and a replacement pad, a dismounting mechanism is arranged at the joint of the middle sheet and the replacement pad, the dismounting mechanism comprises a placing groove, the placing groove is arranged on the surface of the top end of the middle sheet, the top end and the bottom end of the front surface of the middle sheet are respectively provided with a connecting sheet, and the connecting sheets are connected with the bed. A second hook-and-loop fastener is arranged at the top end of the rear surface of the connecting piece, a first hook-and-loop fastener is arranged on the rear surface of the second hook-and-loop fastener, and a groove is formed in the portion, located on the outer side of the inner wall of the middle sheet, of the first hook-and-loop fastener. By designing a disassembling mechanism, the operation of disassembling the replacement pad can be completed only by pulling a connect