The invention belongs to the field of shot blasting devices, and specifically discloses a rust-removal shot blasting machine. The rust-removal shot blasting machine comprises a transfer device for transferring boards, a shot blasting device for performing shot blasting on the boards, a rotation speed increasing device, and a screening and rust-removing device, wherein the shot blasting device is positioned above the transfer device; the rotation speed increasing device is positioned at one side of the transfer device, and can receive the positions of steel shots; the rotation speed increasingdevice comprises an accelerating mechanism and a top plate; the accelerating mechanism is a belt accelerating mechanism and is positioned below the top plate; an accelerating gap is formed between theaccelerating mechanism and the top plate; the screening device comprises a shot receiving plate, a screening spring and a rust-removing plate which is inclined downwards towards the accelerating mechanism; the shot receiving plate is positioned below the an accelerating belt; the downwards inclined end of the rust-removing plate is hinged on the shot receiving plate; the rust-removing plate is positioned at one side, away from the transfer device, of the accelerating mechanism; and the screening spring is fixedly connected between the shot receiving plate and the rust-removing plate. The rust-removal effect of the shot blasting machine is improved by reducing rust stains on the steel shots.