Model ZGC-40 slag ladle truck,as the first generation product made in Chi-na,was developed with success and used well for slag hulag in steel making,The authorintroduces the application of slag ladle truck in the world steel industry,and the functionsand characteristics of the main systems of model ZGC-40 slag ladle truck the industrialtests have shown that this truck had the designed performance,met the needs in applica-tion,and produced good economic result and Social benefit.