Multi-stage screening device for aluminum oxide powder

The utility model discloses a multistage screening device for aluminum oxide powder, which comprises a screening machine body, a plurality of screening units are arranged in the screening machine body, the screening units and the screening machine body are detachably arranged through connecting mechanisms, and screening nets are mounted on the screening units through dismounting and mounting mechanisms. A plurality of first outlets corresponding to the screening units are formed in one side of the screening machine body, a second outlet is formed in the bottom of the screening machine body, a feeding port is formed in the middle of the top of the screening machine body, and a supporting frame is fixedly installed at the bottom of the screening machine body. By arranging a series of structures, multi-stage screening is achieved, the multi-stage screening efficiency is high, time and labor are saved, the screening units are detachably designed, the number of the screening units is determined according to the gr