Mixing system for powdery materials

The utility model relates to a mixing system, in particular to a device for mixing powdery materials having good mixing flowability but certain viscosity. The device comprises a mixer, wherein the mixer comprises a container; a vertical-type screw conveyer is arranged in the container; the feeding hole of the screw conveyor is located at the upper end of the container, and the discharging hole thereof is located at the lower end of the container; the feeding hole and discharging hole of the screw conveyor are communicated with the inner cavity of the container; and the feeding hole of the mixer is communicated with the feeding hole of the screw conveyor, and the discharging hole thereof is located on the lateral wall of the container at the lower part of the container, wherein the discharging hole is provided with a valve. When the materials are conveyed upwards in the vertical direction by the screw conveyor in the mixer, the materials are extruded and kneaded by each other, thus scattering bunched or lumped materials; the materials are conveyed and scattered in a reciprocating manner, so as to be mixed evenly; the mixing system of the utility model has the advantages of simple structure, reliable operation and convenient maintenance and use; and the mixed materials are evener.