The utility model relates to a bolt eliminating machine. The bolt eliminating machine can effectively solve the problem that bolts are scrapped when adhering to concrete at a construction site. A work table is provided with a work surface capable of sliding from left to right, the work surface is provided with a fixing frame, the fixing frame is provided with a bearing, a fixing rod is installed in the bearing, and the two ends of the fixing rod are arranged outside the bearing. A left fixing sleeve is installed at the right end of the fixing rod, a hydraulic cylinder arranged on the work surface horizontally is installed at the right end of the fixing frame, and the axis of the hydraulic cylinder and the axis of the fixing rod are arranged on the same line. A right fixing sleeve which corresponds to the left fixing sleeve and can rotate is installed at the left end of a telescopic rod on the hydraulic cylinder. An elimination frame fixed on the work table is arranged between the left fixing sleeve and the right fixing sleeve and is provided with a round hole, the axis of the round hole and the axis of the left fixing sleeve and the axis of the right fixing sleeve are arranged on the same straight line, and external threads are arranged in the round hole. A motor is installed at the left end of the fixing frame, a speed reducer is installed at the right end of the motor, and an output shaft of the speed reducer is connected with the fixing rod. The bolt eliminating machine is novel and unique in structure and good in elimination effect and reduces material waste greatly.