Rapid clamping device

The utility model discloses a rapid clamping device, which comprises a locking wrench, a bolt, a connecting shaft, a screw and a basal part, wherein the basal part comprises a first branch and a second branch which are arranged at intervals; a first through hole is formed in the first branch; a second through hole is formed in the second branch; the screw comprises a screw cover and a threaded rod part; the screw cover is arranged outside the outer surface of the first branch; the threaded rod part penetrates through the first through hole and is provided with external threads; the connecting shaft comprises a front shaft and a rear shaft; the front shaft and the rear shaft are connected in a rotating separation manner; a threaded hole in threaded joint with the external threads of the screw is formed in the front shaft; a bolt hole located outside the outer surface of the second branch is formed in the rear shaft; the locking wrench is pivotally installed on the rear shaft through the bolt inserted into the bolt hole; in a locking state, the screw cap is abutted against the outer surface of the first branch, and at the moment, the locking wrench can reversibly pivot with respect to the bolt, so that the connecting shaft and the threaded rod part move towards the first branch so as to unlock the rapid clamping structure.