虽然科技水平的提升使煤矿机械化的程度提高很多,但是在长期运行中会出现很多问题,在煤矿的生产中数控机床的机械加工是生产操作的重点环节,如果出现故障,必然会产生安全隐患。文章介绍了PMC的功能以及操作方法,具体探讨了在煤矿数控机床中的维修和故障诊断中起到的作用。 Although the upgrading of science and technology has greatly increased the mechanization of coal mines, many problems occur in the long run. Machining of CNC machine tools in coal mines is a key link in production operations. If a fault occurs, it is bound to create a potential safety hazard. This paper introduces the function and operation method of PMC, and discusses the function of PMC in maintenance and fault diagnosis in CNC machine tool.