Abstract: In the context of the energy shortage, the raw material price rising and the deteroration of the ecological environment in coal mining areas, the ecological efficiency has become the shackles of the sustainable development of coal city industrial ecosystem (CCIES).Based on the translog production function, analysis and evaluation were carried out in this paper on the ecological efficiency and promotion potential of CCIES in our country by stochastic frontier analysis, and by using K-Means algorithm, clustering analysis was made on 28 CCIES. The results showed:the regional ecological efficiency has an obvious difference, and the energy price, technological innovation and marketization level have a significant impact on the coal city ecological efficiency.