Aimed at the explosion of the CH4/CO2 reforming reaction,a series of investigations were carried out to explore the explosion characteristics of the carbon powder. It is indicated that the higher the volatile content in the carbon powder,the greater the explosion intensity. The coal powder samples and the explosion products were analyzed by the industry and SEM. The industry analysis shows that after explosion the volatile content in the coal powder decrease 5%10%,the ash content increases slightly and the moisture content changes weakly. The SEM analysis reveals that the explosion products appear similar to spheres and smoother than the original samples,and that the coal powder cannot combust sufficiently. Investigated results display the explosion mechanism that the volatile matter is firstly released from the heated coal powder samples and joins in reaction,consequently causes explosion. In essence,the carbon powder explosion is a gas explosion.