Sheet punching machine for producing button cells

The utility model discloses a punching machine for producing button cells, which comprises a support underframe, a frame mounted at the top of the rear end of the support underframe, a punching head arranged at the bottom of the front end of the frame, and a transmission belt mounted at the bottom of the middle end of the support underframe, a workbench is arranged at the top of the middle end of the support underframe, and a punching hole is formed in the workbench and right opposite to the lower part of the punching head. A plurality of stamping holes are sequentially arranged above the workbench at equal intervals, limiting pipes are correspondingly arranged below the stamping holes, the bottoms of outlets of the limiting pipes correspond to placing openings in a placing box, the placing box is placed above the conveying belt, a first hydraulic rod is installed on the inner wall of the rear end of the supporting bottom frame, and a first push plate is installed at the telescopic end of the first hydraulic