Dust-collector of suction cleaner

The utility model relates to a dust collector of a suction cleaner, which comprises a fastening ring (1), a filter (2), an air inlet (3) of the suction cleaner, a pressure ring (4), a dust bag (5) and a suction cleaner body (6); the dust bag (5) is arranged in the suction cleaner body (6), the upper mouth of the dust bag (5) is fixed on the upper mouth of the suction cleaner body (6) by the fastening ring (1), the air inlet of the dust bag is fastened and fixed on the air inlet (3) of the suction cleaner by the pressure ring (4), and the filter is connected with the upper mouth of the suction cleaner body. The utility model can increase the garbage amount of the dust bag and is clean and convenient when the garbage is cleaned, any existing plastic bag can be used as the dust bag, and the cost is low; the transportation and processing of the garbage is convenient, the environment is not polluted, and the utility model is adapted to the existing environmental protection requirement for bagging urban garbage.