The fractal theory, which is one of the nonlinar sciences, has been applied to many kinds of fields. In the field of Geomorphology , mathematical methods are first poured into drainage geomorphology for the study of its forming and evolving. The utilization of fractal theory ,however ,breaks up the limit of these traditional means and creats a new way. Although.it is a beginning to apply it in the drainage geomorphology, its strong vitality has been displayed. This article analyses the fractal characters of the drainage geomorphology and intensingly introduces all kinds of fractal models in the drainage geomorphology all over the world and its latest development.