Man-hours management is a basis of production management work, which influences on the arrangement and adjustment of production tasks. Metro is a typical discrete product, whose parts is numerous and has complex assembly processes. The man-hours management system works in the production process, to improve the quality of product. This paper shows the implementation and application of man-hours management system in CRRC HANGZHOU CO.,LTD. The result shows that the production time of a single metro vehicle cuts down 1958.5 hours, the production efficiency is improved by 20.7%, and the direct economic benefits of enterprise is up to 5 million each year.