Coated steel machine, also known as target welding machine, in the traditional copper, ITO glass, silicon dioxide and other metal and non-metal surface coating technology for artificial steel coating, and artificial steel coating shortcomings are very obvious, first of all, the steel coating is not uniform, which will lead to the use of coated materials; secondly, due to the use of artificial hand scraping coating method will lead to steel coating is not firm, easy to fall off; again, the manual scraping and coating of the efficiency of very low, consume a lot of artificial labour; finally, due to control or other reasons will lead to waste of steel metal. Finally, due to the control or other reasons, it will lead to the waste of steel metal. Our ultrasonic technology is a good solution to these problems. It is mainly used for the surface coating of flat targets, replacing the old backward technology of manual scraping.