Abstract: The current computer dynamic graphical simulation systemwhich simulates the locomotive circuit process is only used fortrainingtrainees, and cannot be used bythe designerof locomotive electric circuits. Moreover, because of the rapid change of locomotive types, the designers have to repeatedlywrite and input the logic control programs. It is notonlytime consumingbut difficult aswell. In viewofthis status quo, the authors ofthis paper putforward amethod for designing a development platformof dynamic graphical simula- tion systemfor locomotive circuits, inwhich logic simulation files are automatically produced by computer it- self according to the input electric circuit principle graphs.