Abstract: To prevent spontaneous combustion and explosion during preparation and storage of pulverized coal,the preparation of pulverized coal and coal quality detection should be paid more attention.Summarize the common pulverized coal preparation technology,point out that the low metamorphic bituminous coal is the common fuel for industrial boiler,and the higher volatile,the lower smoldering temperature.The explosion of pulverized coal is largely influenced by its concentration,oxygen content,ignition source,volatile and particle size.Introduce the specific hidden trouble prevention measures from the aspect of drying system,pulverized coal storage system,processing set-up and maintenance.