Air blasting device

The utility model discloses an air blasting device, which comprises a blasting tank, an air blower, an air blower and an air blower, an inner blasting cavity is arranged in the blasting tank, an opening is arranged at the top of the inner blasting cavity, the blasting tank is provided with a feed port and a discharge port, and both the feed port and the discharge port are communicated with the inner blasting cavity; the bottom cover is arranged at the discharge hole in an openable and closable covering manner; the air compressor is provided with an air outlet, the air outlet is communicated with the blasting inner cavity, and the air outlet is lower than the feeding port; the piston is arranged in the blasting inner cavity and can move up and down along the blasting inner cavity, and a push rod is arranged at the top of the piston and penetrates through the opening to extend out of the blasting tank; the sleeve is vertically through to form a cylindrical structure, the blasting tank is sleeved with the sleeve