Distributive fluvial system developed around the Sugan Lake Basin was studied by using geographic information software such as Google Earth, Global Mapper and digital elevation model (DEM). The gradient, fan radius, draining basin area and perimeter, the area and perimeter of DFSs around the Sugan Lake Basin were analyzed. The results demonstrate that the DFSs developed around the margin of the Sugan Lake Basin is concave in the radial section and convex in the cross section. The channels developed on DFSs are radial distributed downstream along the apex. Correlation analysis of geometric parameters shows that the fan area is positively related the radius, and positively correlated with the source area, but negatively correlated with the slope. There are significant variations in the radius, gradient, area, draining basin area and channel pattern of different DFSs developed in different parts of the basin margin. These differences are mainly related to the tectonic settings of DFS, lithology of source rock, and hydrological conditions. The influence of tectonic setting on DFS is mainly reflected in the area of the draining basin and the slope of DFSs. The higher intensity of the tectonic activity, the greater the change of DFS geometry. The influence of source rock lithology on DFS is mainly manifested in the sediment flux, the draining basin with loose and erodibility source rock could supply more sediment for the growth of DFSs and deposit larger DFSs. Hydrological conditions play an important role during the sedimentary process of DFSs, rainwater is the elementary source of water in the draining basin, and the snowmelt water from a fraction of mountains offer an extreme hydrodynamic for the associated draining basins. A draining basin with snowmelt water fed larger DFSs.