Coal gangue is one of the most discharged industrial solid wastes. Coal gangue has the characteristics of low volatility, high ash content, low calorific value and difficult combustion, which limits the large-scale energy utilization of coal gangue. The mixed combustion of low calorific value gas and gangue can effectively improve the combustion effect. In the combustion process, the components of low calorific value gas have an important influence on the pyrolysis characteristics of coal gangue, and the pyrolysis of coal gangue in a reasonable atmosphere plays an important role in improving the combustion efficiency. At present, there are few researches in this field, and the pyrolysis characteristics and mechanism of coal gangue in different atmosphere have not been fully understood and understood, which hinders the further application and development of energy conversion technology of coal gangue. Therefore, it is necessary to study the pyrolysis characteristics and kinetic mechanism of coal gangue in different atmosphere. Based on the in-depth analysis of the present situation of utilization of coal gangue and low calorific value gas, the characteristics and pyrolysis characteristics of coal gangue were studied