PM10 samples were collected in Yima、Pingdingshan and Yongcheng in summer and winter of 2,008, using the Field Emission Scanning Electron Microscopy (FESEM) to analyze the PM10 micro-morphology and origins. The PM10 average concentration in the three coal mine cities was 100~241μg/m3 during summer and winter. Yima was the dirtiest city. The analysis of PM10 micro-morphology by FESEM revealed the PM10 samples to be comprised of soot aggregates, regular and irregular mineral particles, coal fly ashes, spherical particles（coal fly ashes and secondary particles）, ultrafine particles and some other unresolved particles, which had different origins.The diversity of PM10 type represent the complicacy of pollution sources in coal mine cities and the second atmospheric chemical reactions. Soot aggregates and regular minerals had greenhouse and icehouse effect respectively, which environment effect had mutually restrained characteristic. Coated and hollow fly ashes were unique in coal mine cities and mainly come from coal burning. The number percentage change of different types of particles in PM10 in the same sampling sites in different seasons was affected by different amounts of coal-burning in winter and summer, as well as by atmospheric humidity, wind speed, temperature and other meteorological factors, while the percentage number of different types particles in PM10 of different sampling sites in the same season was not only related with meteorological factors but also with the main pollutant sources near the sampling sites.