Hydraulic punching machine

The utility model discloses a hydraulic punching machine, and relates to the technical field of punching machines. Comprising a base, a supporting plate is fixed to the top of the base, a top plate is fixed to the top of the supporting plate, a hydraulic cylinder is fixed to the top of the top plate, a punching device is arranged at the bottom of the hydraulic cylinder, a workbench is fixed to the top of the base, an air cylinder is fixed to the inner side of the supporting plate, and a piston rod is connected to an inner piston of the air cylinder; a clamping plate is fixed to the end, close to the punching device, of the piston rod. According to the hydraulic punching machine, an air cylinder is controlled to enable a piston rod to move into the air cylinder, then when the two sets of clamping plates are far away from each other and the clamping plates move to designated positions, the clamping plates extrude sliding blocks, then the sliding blocks drive sliding rods to slide in sliding grooves, cylinders a