This can welding machine is suitable for a variety of can types of 10-25L square can and multi-purpose. Double crank suction and cupping, magnetic separation, to solve the problem of abrasion of the plate. The round forming machine, electrical tin body rounding welding machine, adopts automatic lubrication system to solve the problem of stopping due to insufficient lubrication. Double test, fast, accurate, and automatic elimination, accurate and continuous production. It is the most ideal automation equipment for food can making and chemical can making industry.