The product can be uniformly dispersed in the base fluid of fracturing fluid, effectively reduce the filtration loss of fracturing fluid and improve the sand carrying performance of fracturing fluid. When the fiber forms a similar network structure in the fracture, it reduces the proppant settlement before the fracture closure, improves the effectiveness of the proppant placement in the fracture profile, prevents the proppant backflow, and has good compatibility with fracturing fluid, crosslinking agent, gel breaker and other additives. It can degrade itself under the condition of formation temperature and has no damage to the reservoir.