After analyzing the international and domestic situations of the railway design CAD，it is found that there is a not small gap between our country and other developed west countries in this field. Starting from the reality that our country needs to catch up with the international advanced level of the railway design CAD in such a short time but on such a basis,the authors present an idea that the development of our country's railway design CAD should be based on an advanced platform in the international railway design CAD trend.