The invention relates to a twisting machine for twisting and processing rod pieces in a window wiper, which comprises a stand, a moving bracket, a rotating bracket, a rotating bracket seat, a rotating shaft, a gear, a rack, a twisting cylinder and clamping cylinders, the rotating bracket seat is fixed at one side of the upper end of the stand; the moving bracket is in slip connection with the upper end of the stand at the other side opposite to the rotating bracket seat; the rotating shaft is rotatablely connected with the rotating bracket; the gear and the rotating bracket are connected with the rotating shaft to rotate with the rotating shaft coaxially; the clamping cylinders are respectively installed on the moving bracket and the rotating bracket; when the piston rods of the clamping cylinders extend outwards, the two ends of the rod pieces are clamped; the gear and the rack are meshed; the rack is connected with the piston rod of the twisting cylinder fixed at the upper end of the stand; the piston rod of the twisting cylinder moves and drives the rack; and as the rack and the gear are meshed, the gear and the rotating bracket rotate. The invention does not need molds, can realize the purpose of twisting and processing rod pieces of different lengths at any angle, and has the advantage of quick and convenient processing.