A design scheme of two positions two channels grease valve driven by stepper motor was proposed,and the design of valve core and driving device was introduced.This scheme used stepping motor as the driving,and the thrust was greatly increased,and it was able to work stably under 40 MPa.The two positions two channels valve spool in using,not required of the laying of oil return pipeline,reduced the cost of the system,and was able to form a stable back pressure.The clip and tighten pressure of the valve core was effectively reduced by using a pressure reducing groove.Through the test of the nominal pressure,nominal flow,pressure loss and maximum allowable back pressure,it is shown that the designed two positions two channels grease valve driven by stepper motor can effectively improve the reliability of intelligent grease centralized lubricating system,and it can improve the safety of lubrication equipment.