Material impurity separation device

The utility model discloses a material impurity separating device in the technical field of chemical engineering. The material impurity separating device comprises a hopper tank body, an air compressor, a feeding pipe, a discharging pipe, an exhaust pipe and a separating mechanism, the separation mechanism comprises a partition plate and a connecting pipe; a circular hole is formed in the partition plate, the partition plate is arranged in the hopper tank body, and the partition plate is connected with the output end of the air compressor through a connecting pipe; the feeding pipe is connected with the hopper tank body, and the exhaust pipe is connected with the hopper tank body; by arranging the separating mechanism, polyolefin particles and impurities entering the hopper tank body through the feeding pipe are blown through output gas of the air compressor, so that dust, wire drawing materials and other impurities suspend in the falling process, and the polyolefin particles continuously fall under the actio