Domestication of coal machine gear reducer has become a trend,but domestic worm gear reducer has many problems,such as serious fever,low transmission efficiency,obvious worm gear wear,low life,especially the wear resistance of worm gear has become a “neck” technical problem in the industry.The fault existing in domestic worm and worm reducer was analyzed.Through the study of the worm and worm gear material,processing,assembling and lubrication etc,a materials selection scheme for the worm gear and worm reducer,worm gear and worm surface quality control suggestions,worm gear and worm assembly and lubrication,were provided.Finally through the bench test and industrial test,the reducer can be used in the mine for more than 6 months without abnormal conditions,indicating that the development of the reducer is successful.