In this paper, SBM super efficiency model is used to measure the environmental efficiency of the power industry in 30 provinces of China from 2008 to 2017, and spatial differences and spatial autocorrelation analysis are carried out. The results show that: the environmental efficiency of China''s power industry is still relatively low; the eastern part is higher than the western part, and the western part is higher than the central part; there are significant differences in the environmental efficiency of different provinces in each year; and there is spatial dependence. Through Tobit regression, the empirical results show that: there are significant regional differences in the influencing factors of environmental efficiency of China''s power industry; the level of economic scale, power structure, technical level and coal efficiency have a promoting effect on the environmental efficiency of China''s power industry; the level of population has a reverse effect on the environmental efficiency of China''s power industry. Finally, some policy suggestions are put forward to improve the environmental efficiency of China''s power industry.