Protective device for shot blasting machine

The utility model relates to the technical field of shot blasting machines, in particular to a protective device for a shot blasting machine, which comprises a shot blasting machine shell, a first protective box, a second protective box and a material conveying platform, the top of the first protective box is embedded with the shot blasting machine shell, and the material conveying platform horizontally penetrates through the inside of the shot blasting machine shell and the inside of the first protective box. The side face of the second protection box is of a U-shaped structure and fixed to the two sides of the first protection box, a collecting hopper is installed at the bottom of the first protection box, the two sides of the collecting hopper are vertically connected with first supporting legs, second supporting legs are arranged on the two sides of the material conveying platform, and a supporting plate is horizontally welded between the adjacent first supporting leg and second supporting leg. The two si