A lifting device is applied to a multi-plate equipped apparatus to control a part of plates of the multi-plate equipped apparatus to rise or go down, and includes a push rod assembly, a retractable shaft, a motor, and a lifting mechanism, wherein the motor drives the retractable shaft to extend or retract. An end of the retractable shaft is connected to the push rod assembly. The push rod assembly is operatively coupled to the plates, so that during the driving process by the retractable shaft, the plates could be lifted smoothly by the guidance of the lifting mechanism.
