Abstract: The invention discloses a dust cup with a self-locking rotary latch. The dust cup includes a dust cup body, a dust cup cover, rotary release blocks and a release button. The dust cup cover is positioned on the dust cup body. The dust cup body is provided with an annular rotary working groove. Two rotary release blocks arranged symmetrically are provided in the rotary working groove. The dust cup is firmly locked with the body shell, and the self-locking latch structure prevents the dust cup from detaching from the vacuum cleaner when the vacuum cleaner falls. The latch structure of the dust cup is compact, so as to be integrated into the volume of the dust cup without compromising performance, thereby keeping the dimension of the dust cup as compact as possible and saving the space of the dust cup.