The invention discloses an electrocar tyre processing unit, which comprises a crushing box. The bottom of the crushing box's inner chamber is provided with a fixed cylinder, inside which steel balls are arranged. Two ends of the bottom of the crushing box are both provided with supporting legs. The bottom of the crushing box is fixedly connected to the top of a motor, a rotating shaft of which is fixedly connected to one end of a rotating rod. The other end of the rotating rod successively passes through the bottom of the crushing box and the top of the fixed cylinder. The surface of the rotating rod body positioned in the inner chamber of the fixed cylinder is provided with a turntable, which is in lap joint on the surface of the steel balls. According to the electrocar tyre processing unit, as the rotating rod is provided with a thread ring, after an electrocar waste tyre is put into the crushing box, by starting the motor, the rotating rod is driven to rotate such that the thread ring rotates, and the tyre will be driven to rotate and decline by the thread theory of the thread ring. While the rotating rod rotates, a passive rod is driven to rotate. Through a small reamer on the passive rod, the electrocar waste tyre which is swinging by rotation of the thread ring is reamed and cut. Thus, the waste tyre is turned into a new one through processing.