Metal material surface treatment sand blasting machine

The invention discloses a metal material surface treatment sand blasting machine, and relates to the technical field of sand blasting treatment. The metal material surface treatment sand blasting machine comprises a sand blasting cabin, a sealing door and a workbench which are arranged on a sand blasting machine body, the top of the sand blasting cabin is fixedly connected with a mechanical arm, the mechanical arm comprises a connecting column, the lower end of the connecting column is fixedly connected with a fixing plate, and the lower side wall of the fixing plate is fixedly connected with a fixing cover; and the top of the fixed cover is fixedly connected with an air supply pipe and a material supply pipe. The sand blasting device can automatically crush and flatly spread sand blocks by using impact force during air flowing as power, is more convenient to crush, is more energy-saving and environment-friendly, is convenient to treat and reuse the sand blocks and is convenient to dry the wet sand blocks, so