Bag-type dust collector with internal filter bag capable of vibrating and shaking dust

The invention provides a bag-type dust collector with an internal filter bag capable of vibrating and shaking dust, which comprises a shell, a partition plate is arranged in the shell, a through hole is formed in the partition plate, a bracket is arranged on one side, facing a filter part, of the partition plate, the filter bag is sleeved outside the bracket, and the bracket comprises a plurality of support plates distributed around the outer side edge of the through hole; an air filtering channel is defined by the multiple supporting plates, expansion plates are arranged between the supporting plates and the filter bags, first elastic mechanisms are arranged in the air filtering channel and connected with the expansion plates so that the expansion plates can retract inwards, and a driving mechanism is arranged at the top of the shell and is in driving connection with the extrusion blocks; the extrusion block is used for moving in the axial direction of the air filtering channel and extruding the first elasti