The invention discloses an automatic separating machine adopting zipper numerical control to vertically stop injection molding. The automatic separating machine is structurally includes a sensor, an injection molding table, a control panel, a lathe bed, a motor, a foot rest, a control box, a locating device, a lifting column, a die plate, a driver, a reducer, a hopper, a discharging pipe and a heater; the injection molding table is arranged on the lathe bed, the control panel is fixedly connected with the lathe bed, and the motor is arranged in the lathe bed; a regulator is arranged on a circuit board, a positioner is connected with the regulator, and a wire socket is fixedly connected with an outer shell; the lifting column is arranged on the injection molding table, the die plate is connected with the lifting column, and the reducer is fixedly connected with the hopper; and the hopper is arranged on the discharging pipe, and the heater is connected with the die plate. According to the automatic separating machine adopting the zipper numerical control to vertically stop the injection molding, the problems that the injection molding cannot be accurately performed on a zipper through an existing zipper numerical control machine, repeated debugging is required, plastic is wasted, and the workload is increased can be solved.