In most of the automatic lubrication system of common CNC machine tools, the method of setting the fixed time interval is adopted to start and stop the timing lubrication, without considering whether the machine really needs lubrication after the timing arrives, which is easy to cause energy waste.Aimed at the feedback problem of some machine tool manufacturers and machine tool users, an energy-saving control method of automatic lubrication system was proposed. In the method， regular maintenance reminder function and power off memory function were added. The method has better energy saving effect compared with traditional methods.