Welding involves complex physical and chemical process, the number of variables used to describe its variety, with the product structure change constantly, only with the accumulation of experimental data and experience to understand and control the welding process, is both unrealistic and the waste of manpower and materials. In recent years, with the continuous development of the finite element analysis and improvement of welding simulation technology has been well known, it has successfully solved many problems in engineering field, which will not become visible welding process visualization, save a lot of time for the actual production cost