Abstract: A detailed description of how to select the multiphase model, cavitation models, turbulence models and phase-change threshold pressure for cavitation viscous simulation was presented at first, then the improved Sauer cavitation model accounting for both of the effect of mass and volume fraction of non-condensable gas (NCG) on mixture density and effect of turbulence on phase-change pressure was proposed, and at last, four kinds of modified turbulent models were analyzed for sheet cavitation simulation of propeller blade section named NACA66(mod). The validation of sheet cavity area of E779A propeller under different cavitation levels using improved numerical models was completed. The results show that, being the best, NCG mass fraction and volume fraction is 7.8×10^-4 and 1.0×10^-6 respectively, and the initial bubble radius is 1.5 μm. Results of cavitation simulation for 2D hydrofoil sheet show that the modified SST model with μ_t=ρ_mk/ω, the density function modified k-ε turbulence model and filter-based modified k-ε model all fit well and are better than the SST model with mixture density being introduced to turbulent viscosity directly. For the cloud cavitation simulation, two modified k-ε turbulence models are relatively better. All simulated cavity areas under lightly, moderately or heavily cavitation conditions of propeller are agreement quite well with the experimental data. It could be concluded that the comprehensive measure of improved Sauer cavitation model and modified SST turbulent model is effective, which could be productive for low noise marine propellers design.