Pulse dust collector is important part of desulphurization pulverizer. Pulse dust collector consists of frame, filter unit, spray blowing dust cleaning device and ash exhauster. Frame consists of upper box, medium box, ash bucket, air intake and air outlet. Filter unit consists of cartridge assembly. Spray blowing dust cleaning device consists of air bag, injection pipe, impulse valve and pulse controller. Ash exhauster consists of starlike unloading valve. Pulse dust collector takes advantages of high purification efficiency, large gas handling capacity, stable performance, convenient operation, filter bag with long service life and small maintenance workload.