Powder mixing machine

The utility model provides a powder mixing machine and relates to the technical field of powder mixing. The powder mixing machine comprises a mixing box, an auger barrel is arranged in the mixing box, an auger is arranged in the auger barrel, a round groove is formed in the top of the mixing box, the auger penetrates through the round groove and extends to the top of the mixing box, a square rod is fixedly connected to the outer side of the auger, a round rod is arranged on the outer side of the square rod in a sleeving mode, and the round rod is fixedly connected to the top of the mixing box. A reciprocating assembly is arranged on the outer side of the round rod. According to the powder mixing machine, an auger rotates in an auger cylinder, so that powder at the bottom end of the interior of a mixing box can be conveyed from bottom to top, meanwhile, rotation of the auger drives a round rod to rotate through a square rod, and the round rod drives stirring rods arranged on the two sides of the bottom of a co