Plastic particle mixing device

The utility model discloses a plastic particle mixing device. An air supply pipe communicated with the inner part of a tank body is arranged at the top of the side wall of the mixing device, wherein the plane of a pipe orifice of the air supply pipe is perpendicular to the tangent plane of the joint of the side wall of the tank body and the pipe orifice of the air supply pipe, so that air can enter the tank body in the tangent direction of the tank body and rotates in the horizontal plane under the constraint of the side wall of the tank body; the pipe orifice of the air supply pipe is close to the top wall of the tank body, so that the air enters the tank body and is rebounded by the top wall of the tank body to form downward airflow; an air outlet pipe in the lower position ensures that air simultaneously rotates and moves downwards, so that air which spirally moves down can be generated; the plastic particles introduced into the tank body are dispersed under the blowing force of the air which spirally moves down; by virtue of the rotation of the air, the uniform mixing effect of the plastic particles can be improved; in addition, a separation device is capable of effectively and relatively conveniently separating the mixed plastic particles from the air.