Dust collector dust cup with check ring

The utility model provides a dust collector dust cup with a check ring. Firstly, a dust cup is arranged, an air inlet is formed in the side wall; a filter screen is arranged in the dust cup; a bottomcover is detachably mounted at the bottom of the dust cup; a check ring is detachably installed in the dust cup and divides an inner cavity of the dust cup into a first cavity and a second cavity, a through hole is formed in the middle of the check ring, the first cavity and the second cavity are communicated through the through hole, the air inlet is connected to the first cavity, the filter screen is located in the first cavity, and dust sequentially passes through the air inlet and the first cavity and then enters the second cavity. Compared with the prior art, the check ring is additionally arranged, so that dust can settle at the bottom of the dust cup through air pressure difference, the dust is prevented from being adsorbed on the filter screen, the dust collection power of the dustcollector is improved, me