Based on the topographic map of 1∶50 000,fractal dimensions and their spatial variation characteristics of 10 sub-watersheds in Dali River watershed were calculated and analyzed through the construction of digital elevation model(DEM) and by the fundamental principle of variational method and the functions of ArcGIS 9.2 Windows analysis.Results showed that the geomorphologic fractal characteristics of Dali River watershed revealed the spatial variation of topography fragmentation extend and complexity degree,with fractal dimentions increasing significantly from upper stream to down stream and the geomorphologic fractal dimension of right bank being more than that of left bank.The study is of great scientific significance to propel the application of geomorphologic fractal dimensions in the fields of geomorphology and soil and water loss.