China's energy resource endowment determines that the country's energy supply structure is dominated by coal. From 1995 to 2013, coal accounted for more than 65% of the country's total energy consumption, and coal will remain dominant for a long period of time to come. However, the production and consumption of coal inevitably cause pollution and impact on the atmosphere, groundwater and surrounding ecological environment: coal mine mining changes groundwater runoff, resulting in land subsidence, open-pit mining will cause vegetation damage; coal-fired emissions are air pollutants The main source of PM2.5, coal combustion increases greenhouse gas emissions and accelerates climate change. The sustainable development of the coal industry is facing more severe ecological challenges. Faced with increasingly severe environmental and resource constraints, promoting energy structure transformation is an urgent need in China's current stage. The cleanliness, reduction and substitution of coal are the trend of national energy development.