Abstract: in order to extend the service life of Zhangcun Coal Mine, the second level of Changcun Coal Mine and the sixth mining area in the north are designed to be exploited as the expansion area of Zhangcun coal mine. According to the existing situation of Zhangcun coal mine underground and surface production system, the main factors affecting the expansion area of Zhangcun Coal Mine are analyzed, and the new auxiliary industrial site is determined to be arranged in the northeast direction of Yizi village in the West expansion area Two new shafts, auxiliary shaft and West return shaft, are added. From the aspects of roadway layout, mining level and division of mining area, the development mode of West expansion area of Zhangcun coal mine is determined to maximize the utilization of resources, significantly improve the economic benefits, promote scientific and balanced production, and lay the foundation for sustainable development of coal mine.