Abstract: In order to study the influence of different conditions on the particulate matter produced by coal combustion, the particulate matter produced by coal combustion is separated and collected in 11 ranges of 0-18 μm by micro-orifice uniform deposit impactor under laboratory conditions. The effects of combustion temperature, mass, coal type and size on the formation of particulate matter are studied. The results show that the total particle mass of bituminous coal and lignite at low temperature is obviously higher than that at high temperature. At high temperature, the particle size distribution of the two samples increased in the range of 1.0-10 μm, and the peak size appeared in the range of 0.18-0.32 μm and 0.32-1.0 μm respectively. Compared with lignite, the quality of particles produced by bituminous coal combustion is obviously increased, and the quality of particles produced by bituminous coal combustion is proportional to the quality and size of pulverized coal.