The environmental impact of biomass combustion power generation (BCP) was evaluated from three perspectives (global, regional and local) based on LCA and AHP. The integrated performance evaluation of the environmental impact and resource consumption of BCP was carried out and compared with that of coal-fired power units. The results show that the environmental load is the largest from the global perspective, and the most significant environmental impact category is photochemical ozone formation. In addition, the growth process and the power generation process contribute more to the environmental impact burden. The integrated environmental impact indicator decreases by 57% with the increase of power generation efficiency from 15% to 35%. Compared to ultra-supercritical coalfired generation with DeN and DeS, the global warming, resource consumption and integrated index of BCP with efficiency of 25% are decreased by 87.18%, 60.71% and 13.27%, respectively.