The invention discloses a trash bin type dust collector, comprising a housing component, an inner bin for mounting or fixing a trash bag and a fan which drives an air flow to move so as to charge dustinto the trash bag; the inner bin is mounted releasably on the housing component and is provided with a receiving cavity; the trash bag in the receiving cavity divides the receiving cavity into an upper cavity and a lower cavity; the housing component and/or the inner bin are provided with a dust suction inlet allowing dust to enter the trash bag in the inner bin, an air suction port which sucksair in the trash bag to generate negative pressure and suck the dust from the dust suction inlet into the trash bag, and an air cavity in which the air is sucked by the fan to generate negative pressure; the air suction port is communicated with the air cavity and the upper cavity; the inner bin is provided with a suction hole which sucks air in the lower cavity when the fan operates; the air cavity is communicated with the lower cavity through the suction hole. The trash bin type dust collector has the advantage that trash bag blowing is effectively avoided.