In order to meet the goals of GHG reduction and sustainability in industry,it is necessary to promote strategies to reduce GHG emissions without compromising other economic,environmental and social priorities. Considering that renewable energy technologies usually have considerable environmental influences and uncertain economic and social impacts during the production stages,the environmental,economic and social impacts of China's mc-Si (mc-Si) PV modules production stages were quantitatively assessed in the present study. The environmental impact was evaluated by applying life cycle assessment through the software GaBi 6. The economic analysis was conducted based on life cycle cost,while the social impact analysis was carried out by applying social index evaluation. The results showed that the environmental impacts of mc-Si production,mc-Si cell production and modules assembly were larger than the other two stages' impacts. Pollutants causing climate change impact mainly came from the mc-Si production stage,accounting for more than 50% of the total climate change impacts. Economic analysis revealed that the main cost of mc-Si module production was from raw materials and labor,which accounted for more than 70% of the total costs. The production of mc-Si PV cells had the highest cost among the five processes. As for the social impact,the results showed that the employment contribution indicator was 0.72,indicating that mc-Si PV modules production had prominent contribution to employment. The production capacity increase indicator was merely 0.18, illustrating that the modules production had limited contribution of production capacity improvement. Based on the previous analysis, several primary suggestions were developed to improve the sustainable development of mc-Si PV modules,to improve energy structure and seek for environmentally friendly materials to reduce environmental impact; encourage enterprises to innovate high efficiency technologies to reduce production costs; and shift policy subsidy to market healthy competition to enhance social contribution of mc-Si PV industry.