In mountainous areas, industrial sites are generally arranged in a stepped way. For the characteristics of the step layout, the design practice of the annual 5 million tons low-rank coal multi-generation cycle comprehensive utilization demonstration project of Yan’an Energy Chemical Group Zichang Chemical Corporation Ltd., was taken as an example, the functional division, step setting and elevation in the step layout Design elements such as settings, road connections, rainwater, and shelter types were proposed for rationalization.