Small powder mixing device

The utility model provides a small-sized powder mixing device which comprises a cylindrical barrel and a main rotating shaft vertically arranged in the center of the barrel, a crushing mechanism and a stirring mechanism which are fixed on the main rotating shaft are sequentially arranged in the barrel from top to bottom, and both the crushing mechanism and the stirring mechanism can rotate in the barrel along with the main rotating shaft. The crushing mechanism is of a closed cylinder structure and comprises a side plate, a top plate and a bottom plate, the side plate is formed by sequentially surrounding a plurality of groups of crushing and feeding assemblies, each crushing and feeding assembly comprises a grinding plate and a blocking plate, and the distance between the grinding plate and the inner wall of the cylinder body is gradually reduced from the fixed end of the grinding plate to the free end of the grinding plate. The utility model solves the problem that the size of the powder cannot be refined b