Safety device for punch die

The utility model relates to a safety device for a punch die. The safety device comprises a limiting cushion column, a sleeve, a screw, a connecting frame and a proximity switch. The limiting cushion column is cylindrical, the limiting cushion column is located in the cylindrical sleeve, the screw is connected with the side circumferential face of the limiting cushion column, a linear through groove is formed in the sleeve, and the screw penetrates through the linear through groove; a handle is arranged outside the sleeve; the connecting frame is detachably connected with the side wall of the punching machine, a containing barrel is arranged on the connecting frame, a proximity switch is arranged at the bottom end of the connecting frame and located at the bottom of the containing barrel, and the limiting cushion column can be arranged in the containing barrel. The safety device for the punch press die is used between the upper limiting column and the lower limiting column of the punch press die, so that the