Cross-linked gel fracturing fluid used in hydraulic fracturing is non-Newtonian fluid. Aimed at the proppant settlement law in non-Newtonian fluid. Vertical fracture physical model was used to study the proppant settlement law in the flow of crosslinked fracturing fluid. As we carried out experiments with different liquid flow rate, proppant density and sand concentration. The results show that, in the non-Newtonian fluid, when the fluid flow is slower and the proppant density is bigger and the sand concentration is higher, the particle cluster settlement phenomenon is more obvious. Certain measures should be taken to weaken the impact of the proppant particles cluster settlement in the field construction.