Sand mixing device of sand blasting machine

The utility model relates to the technical field of sand mixing devices of sand blasting machines, and discloses a sand mixing device of a sand blasting machine, which comprises a crushing box and a mixing tank, and a mixing mechanism is fixedly mounted on the inner wall of the mixing tank; the mixing mechanism comprises a stirring motor and a sleeve, a stirring rod is fixedly installed at the output end of the stirring motor, a half gear is fixedly installed on the outer wall of the stirring rod, blades are fixedly installed at the bottom of the stirring rod, the bottoms of the blades are attached to the inner wall of the bottom of the mixing tank, and an arc-shaped rack is fixedly installed on the inner wall of the sleeve. The outer wall of the sleeve is rotatably connected with a fixing sleeve through a bearing, the stirring motor drives the stirring rod to rotate, the stirring rod rotates to drive the blades and the half gear to rotate, the blades rotate to mix materials, the half gear rotates to drive th