Coals with different reducibility and their macerals in China were chosen as the experimental samples. The pyrolysis and isotherm CO2-gasification reactivity and their influencing factors were investigated by thermogravimetric analysis method. The results show that the coal with stronger reducibility has higher pyrolysis reactivity and lower gasification extent than that of the coal with weaker reducibility. With the increase of holding temperature time and pyrolysis final temperature, coal pyrolysis extent increases, while the sample isotherm gasification reactivity presents different properties. Vitrinites show higher pyrolysis reactivity and lower gasification extent than that of raw coals and inertinites. In addition, maceral origin has a remarkable effect on the pyrolysis and isotherm gasification reactivity of coal samples.