High-strength steel bar connecting device and using method

The invention discloses a high-strength steel bar connecting device and a using method. The high-strength steel bar connecting device comprises a base, a rotating frame, a bottom rod and a connecting base. A screw rod is rotationally mounted on the top surface of the base, a movable seat is in threaded fit with the screw rod, and two side arms of the movable seat penetrate through the base and are in sliding fit with the base; rotating frames are symmetrically hinged to the two ends of the base, top plates are arranged on the inner sides of the rotating frames, push plates are arranged on the outer sides of the rotating frames, the top plates and the push plates are connected through inclined frames penetrating through the rotating frames, and the parts, penetrating through the base, of the moving seats are connected with the inclined frames; a chuck is arranged at the output end of the rotating frame, and a sleeve is detachably mounted on the chuck; a slidable connecting base is arranged below the base, clam