Device and method for preventing generation of oxide film during welding of galvanized steel sheet

The invention discloses a device and method for preventing the generation of an oxide film during the welding of a galvanized steel sheet. The device comprises an equipment control device, an electromagnetic valve, an air blowing device, a welding robot, a robot control device, a protection air source and a pressure reducing valve, wherein the equipment control device is separately connected with the electromagnetic valve and the robot control device, protection air output by the protection air source is delivered to the air blowing device through a pipeline and the pressure reducing valve, the air blowing device is arranged by the side of the welding robot, and the protection air is blown onto a product needing to be welded by the welding robot by the air blowing device. Zinc oxide dust produced during the welding of the galvanized steel sheet MAG is eliminated, and the possibility that workers have occupational diseases due to the inhaling of zinc oxide mist and dust is avoided. At the same time, a procedur