Abstract: Analyze the scope of pulse jet dust collector and air box pulse dust collector system in pulverized coal industrial boilers through investigating the principle and deashing modes of bag filter,characteristics of pulverized coal industrial boiler system as well as the practical application of collectors.Taking one bag filter in Cuncaotao NO.2 coal mine as research object,its main problem is that the filter bag lose effectiveness due to oxidation.According to the transformation of bag filter,provide its appropriate structure and maintenance methods,which is beneficial for design,installation and use of bag filter.