The welding plate is used as the base plate of the riveting welding process. There are holes and T-slots on the working face. The holes are mainly used to clean up some iron slag and welding waste during the riveting welding. The T-slots are mainly used to fix the welding parts. Of course, welded flat plates also have flat surfaces, that is, no holes and no grooves. Generally, as long as the correct method is used and preserved, the service life is very long. The accuracy of the working face can be maintained for more than 2 years. When the accuracy is reduced, it can be recovered through debugging or scraping process. The service life of the plate itself can reach 50-100 years. Therefore, during the use process, it is necessary to pay attention not to use and store it in humid, corrosive, too high and too low temperature environment The sample can extend the service life and ensure the work quality.