In order to check whether a prototype can be put into batch peoductio,it isnecessary to conduct and overall performance test and industrial test(or called reliabilitytest)for all new products and modified,produced by transfer or greatly improved old prod-ucts in the mine machinery.Taking underground diesel LHD and electric-powered LHD asexamples,the author described thoroughly the methods and items of performance test andindustrial test providing a reference for the testing workers concerned and the quality in-spection departments in the production or user sectors.Most of the testing items are alsosuitable for the underground mine trackless service vehicles