Hydraulic fracturing is an important technical method for improving the reservoir production，whose aim is forming fractures with high conductivity. The shape of sand banks developed by the settlement of proppant particles determines the stimulation performance. Large scale visible fracture simulator was used to carry out the proppant settlement stimulation experiment based on abundant theoretical researches and scarce experimental studies in China. The sand carrying capability of four kinds of commonly used fracturing fluids，including slick water，linear gel，fiber liquid and crosslinked flu? id，have been evaluated after the shape of sand banks，and the proppant settlement velocity and horizontal migration velocity were analyzed. The results show that the slick water can develop short and high sand banks，so it has the worst sand carrying capability. Crosslinked fluid can develop long and low sand banks，which is also the most gradual one，so it has the best sand carrying capability. The sand carrying capabilities of the linear gel and fiber liquid are between them. The horizontal migration velocities of proppant particles in four kinds of fracturing fluids are 78 percent，85 percent，91 percent and 95 percent of fluid velocity，and the settlement velocities from high to low are slick water，linear gel，fiber liquid and crosslinked fluid respectively. So the appropriate fracturing fluids should be chosen based on the reservoir parameters and the types of fractures in the field.