The utility model relates to a metal machinery processing technology field, specifically an automatic change flexible pressure and rivet device, the workstation that is equipped with gas -liquid supercharging device in the frame and is used for placing the work piece, the workstation bottom is equipped with the graduated disk, gas -liquid supercharging device sets up at the workstation top, servomotor passes through the speed reducer and connects a lead screw, gas -liquid supercharging device is connected to the lead screw, gas -liquid supercharging device includes linear guide, gas -liquid pressure cylinder, displacement sensor, force transducer, displacement sensor, force transducer equallys divide and do not connects gas -liquid pressure cylinder. The utility model discloses a flexibility is pressed and is riveted, and production efficiency is high, and displacement sensor and force transducer link together with gas -liquid pressure cylinder, guarantees that the distance that at every turn pushes down is unanimous with exerting oneself, can press simultaneously and rivet a plurality of positions of product, and straightness accuracy, the hard spacing bad displacement sensor ofbit loss that prevented are guaranteed to push down by two guide arms.