With No. 3 Mine, Pingmei Corporation Ltd. comprehensive mining machinery and equipment repair shop and clear slope winch house, power supply system was far less than the present and the future requirements. Based on this problem, No. 10 clear inclined shaft ground power supply system was optimized, taking use of the original return air inclined shaft to inlet air clear inclined shaft, substation location was chosen, the layout of the high voltage switchgear, transformers and other electrical equipment were settled. No. 10 clear inclined shaft ground load of power system capacity was calculated with care based on the requirements, which ensured the new comprehensive mining machinery and equipment repair shop, clear inclined shaft hoist house and No. 10 clear inclined shaft electrical load increases in the future, and met the long term needs of the mine.