Combustion process and influencing factors have been researched systematically by means of thermogravimetric analysis and kinetics analysis methods on three inertinite-rich Chinese coals and one middle Chinese. The results indicate that coal types, heating rate, and oxygen flow rate are the main effect factors, and yet, the sample usage and particle size have little influence on the combustion of coal. The kinetics analysis shows that unreacted shrinking core model comparatively fits for the mechanism illustration of coal combustion and the activation energy decreases with carbon content in coal increasing and heating rate stepping up.