Hydraulic device facilitating die replacement

The hydraulic device comprises a machine body, the machine body is provided with a hydraulic plate, the hydraulic plate is provided with a forging and pressing assembly opposite to the ground, the forging and pressing assembly comprises a base plate, the base plate is horizontally provided with a bottom plate in a sliding mode, the mold is detachably connected to the side, away from the base plate, of the bottom plate, the base plate is fixedly connected with an air cylinder, and a piston rod of the air cylinder is fixedly connected with a rack; the rack is parallel to the sliding direction of the bottom plate; the axes of the adjusting rods are vertically arranged, threaded grooves are formed in the side walls of the adjusting rods, the adjusting rods are rotationally connected and vertically arranged on the base plate in a sliding mode, each adjusting rod is fixedly connected with a gear, each gear is meshed with the corresponding rack, each adjusting rod is fixedly connected with a pressing block, and the