The utility model discloses a gear type universal coupling which comprises a first fixing frame and a second fixing frame. According to the utility model, a terminal control switch (a controller, a computer or a switch panel) is used for controlling the operation of the motor; the motor drives the first fan-shaped gear to rotate along teeth on the surface of the second fan-shaped gear; the connecting plate drives the second fixing frame to deflect; the second fixing frame drives the position of the output shaft to deflect; meanwhile, the second linkage shaft plug deviates from the moving trackof the second transmission shaft plug through the cross shaft; the first transmission shaft plug deviates from the moving track of the first linkage shaft plug through the cross shaft; the transmission shaft stretches out and draws back in the transmission shaft sleeve; at the moment, the device is still in a normal operation state, the motor is controlled to operate through the terminal controlswitch, the motor drives the transmission gear to rotate, the transmission gear rotates along teeth on the surface of the fixed gear, and meanwhile the transmission gear carries the fixing base to slide in the forming direction of the sliding groove.