Selective screen used in dust collection bin of dust collector

The utility model relates to the technical field of dust collectors, and discloses a selective screen used in a dust collection bin of a dust collector, which comprises a support wall, the support wall is of an annular structure, an inner plate is fixedly connected to the inner wall of the support wall close to the side of an air inlet channel, the inner plate is frustum-shaped, and an included angle is formed between the inner plate and the inner wall of the dust collection bin. Suction force can be generated after external large-particle substances enter the dust collection bin, so that deflection force facing the sections with the screen holes exists on the large-particle substances, the deflection force borne by the large-particle substances facing the sections with the screen holes cannot be balanced due to the fact that the screen hole sections on the inner plate are not evenly distributed, the deflection movement distance can be larger, and the deflection effect of the large-particle substances is impr