Abstract: Ecosystem in coal mining industry is studied based on the theory of industrial ecology.The cause of pollution by coal industry and its' key links have been analyzed.The key links of coal industry ecosystem include coal,mine water,gangue,coal-bed gas,underground heat.According to the principles of perfect system of ecosystem,flowing of energy reasonably and minimum emission,the ecological chain in coal industry ecosystem is constructed.The ecosystem was put in practice in Pingdingshan Coal Mine and had obtained good economic and social benefits.It has a certain reference value and guiding significance to carry out low carbon and recycle research in coal industry in China.