Bag-type dust collector with self-cleaning function

The utility model discloses a bag-type dust collector with a self-cleaning function, which comprises a rack, a plurality of purification bins are arranged on the rack, the purification bins are sequentially connected with a dust collection bin and a dust hopper from top to bottom, a plurality of bags are arranged in the dust collection bin, an air inlet pipe and an air outlet pipe which are communicated with the dust collection bin are arranged on the rack, and a dust suction pipe is connected onto the air inlet pipe. The dust suction pipe is a hose, and a stop valve for opening and closing the dust suction pipe is arranged on the dust suction pipe; when the purification bin is in an open state, the dust suction pipe can extend into the purification bin; a traditional manual cleaning mode is replaced by the dust suction pipe, cleaning is cleaner and more thorough, cleaning time is shortened, and cleaning efficiency is improved; the dust suction pipe does not need to be independently provided with a suction po