In order to improve the bending resistance and wear resistance of precision micro lead screw,the performance study was carried out by taking the 1.6 mm diameter precision micro lead screw transmission pair as object.According to different screw tooth design,different screw materials and heat treatment methods,different supporting nut materials and lubrication strategies,etc.,a series of specimens were designed and processed,and a miniature lead screw transmission pair test platform was built.The bending resistance of different screw specimens under the real working state of the precision micro lead screw transmission pair was tested and compared,and the wear resistance of the precision micro lead screw transmission pairs composed of different nuts was tested and compared,and the best parameter combination was screened out.The result shows that the bending resistance and wear resistance of the optimized precision micro lead screw transmission pair are significantly improved.