Abstract: Using polyvinylidene fluoride (PVDF) as the membrane material and PVP as the pore-forming agent, SnO₂-GO blended PVDF membranes were prepared in situ by non-solvent induced phase separation method under different SnCl₂ additions. The surface chemical properties, microstructure morphology, and hydrophilicity were characterized by FTIR, SEM and contact angle, and the water permeability, retention performance, and anti-pollution performance of the membrane were analyzed using BSA as a simulated pollutant. The results show that the addition of SnCl₂ reagent improves the hydrophilicity of the original membrane to a certain extent. However, with the gradual increase in the amount of SnCl₂ reagent added, the water flux and flux recovery rate of the modified membrane began to increase first and then gradually decreased, and the most appropriate amount of SnCl₂ was 0.3 g.