Sand blasting machine

The invention discloses a sand blasting machine. The machine comprises a support and a machine body, wherein the machine body is provided with a two layers of shells and is arranged on the support, and a sound insulation layer is arranged between the two layers of shells; and the inner cavity of the machine body is divided into an upper chamber and a lower chamber, a discharging valve is arrangedbetween the upper chamber and the lower chamber, the top of the upper chamber communicates with a feeding hopper, a feeding valve is arranged between the upper chamber and the feeding hopper, and thelower chamber is connected with a plurality of nozzles through a plurality of conveying pipelines. The machine body of the sand blasting machine adopts the two layers of shells, the sound insulation layer is arranged between the two layers of shells, and thus working noise generated during working of the sand blasting machine is reduced; the lower chamber of the sand blasting machine is connectedwith a plurality of sand bl