Powder mixer

The invention relates to the field of chemical analysis, and discloses a powder mixer which comprises a hollow main body (1) with one end provided with an opening and an upper sealing cover (2) capable of being arranged on the opening of the main body (1), at least one group of first convex points (3) spaced in the circumferential direction are arranged on the inner circumferential surface of the main body (1), each group of first convex points (3) are arranged at intervals in the vertical direction, and each group of first convex points (3) are arranged at intervals in the vertical direction. The first protruding points (3) are hemispherical protrusions from outside to inside. Through the technical content, when particle mixtures with different particle sizes move along the inner wall of the inner cavity of the main body under the action of external force, the particle mixtures are obstructed by the hemispherical bulges of the first convex points; therefore, the three basic principles of hybrid dynamics are