Multiple-station rotary feeding sand-blasting machine

The utility model provides a multiple-station rotary feeding sand-blasting machine. The multiple-station rotary feeding sand-blasting machine comprises rotary sprayer pipes, a guide rail, a walking trolley and a plurality of unpowered supporting trolleys, wherein the walking trolley and the unpowered supporting trolleys are arranged on the guide rail; a sand-blasting tank and a fixed sprayer pipe connected with an outlet at the lower part of the sand-blasting tank are fixedly arranged on the walking trolley; a liftable fixed bracket and a rotary sprayer pipe driving system are fixedly arranged on the walking trolley; a supporting trolley lifting device and a bearing roller for bearing the rotary sprayer pipe are mounted on each unpowered supporting trolley; the right end of the fixed sprayer pipe is fixedly connected with the liftable fixed bracket; the rotary sprayer pipe driving system comprises a reducing motor, a driving chain wheel driven by the reducing motor, a coupler and a plurality of driven chain w