Baghouse dust bag is a key part of the process of running, usually cylindrical bag suspended vertically in the precipitator. Bag fabric and design should be the pursuit of high efficiency filter, easy to peel off the dust and durable effect. Dust bag is mainly played the role of dust in the bag filter dust bag play a key role, it is the main core parts. Dust bag is an effective dust filter, having a high collection efficiency can be good ventilation, and a certain acid and alkali and heat capacity of the weaving process used in the multilateral brushed. Increase the thickness of the fabric and elastic, very good dust, dust removal rate of up to 99.99% of the dust bag is taken polyester staple fiber as raw material, life is generally 4-6 times that of glass fiber fabric has good permeability, dust collection rate high capacity cleaning dust removal efficiency up to 98.99%. Baghouse dust bag is to determine the removal efficiency and operating temperature of key components, the cost to replace the bag is the main baghouse maintenance costs, and therefore related to the dust bag working life and cost of running the state, select the appropriate the media and well-designed structure is particularly important.