A scrap removal device for a laser processing device includes a gas deflector having an optical channel; a looped gas channel; and a looped gas outlet. The looped gas outlet is connected to the looped gas channel, the optical channel is configured for a laser beam to transmit through, the looped gas channel surrounds the optical channel, and a section of the looped gas channel close to the looped gas outlet is inclined. The scrap removal device further includes a gas source furnished on the gas deflector and in communication with the looped gas channel for providing a gas flow to flow into the looped gas channel. The gas flow is joined with the laser beam transmitting along a looped processing path when flowing out of the gas deflector through the looped gas channel and the looped gas outlet.