The dominant impact factors of combustion performance of semi-coke were discussed by thermo-gravimetric analysis.The mechanism of difference in combustion performance of semi-coke was revealed by specific surface area and pore structure analyzer and scanning electron microscopy.The results demonstrate that pyrolysis environment is an important factor of the combustion performance of semi-coke.For the same coal,the combustion performance of semi-coke deteriorates with the increase of temperature and time dur...