The invention discloses an automatic pushing device for pedicle screws. The device comprises a mechanical arm, a lead screw base, a stepping motor, a lead screw, a lead screw motion sliding block, a rotation motor and a controller; the lead screw base is fixed on the mechanical arm, and the lead screw is installed in the lead screw base; the stepping motor is installed at the top of the lead screwbase and connected with the lead screw; the lead screw motion sliding block is installed on the lead screw, and the stepping motor drives the lead screw to rotate so that the lead screw motion sliding block can move up and down along the lead screw; the rotation motor is installed in the lead screw motion sliding block; an adapter is installed at the front end of a rotation shaft of the rotationmotor and can fix the pedicle screws; the controller is connected with the stepping motor and the rotation motor separately and controls the rotation speed, torque and forward speed of the stepping motor and the rotation motor. The automatic pushing device is high in pushing precision and has a force feedback function, and the position change of the pedicle screws in the body of a patient can be reflected in real time. The device is remotely operated by a doctor, the situation is effectively reduced that surgeons are exposed by rays in the operation, the surgical time is effectively shortened,and the learning and training period of the surgeons is shortened.