In recent years, there are many reports on super vortex quick separation (SVQS) system using air instead of oil steam, but the performance parameters such as separation efficiency are not very accurate, moreover the influence of oil steam properties on the performance of the system has not been studied. In order to promote the industrial application of SVQS system and accurately evaluate its performance, the flow fields at a series of oil steam model with different densities and viscosities in a ?600 mm×4150 mm SVQS system were simulated by the commercial software FLUENT 2019 R3. The influences of oil steam properties on the dimensionless tangential velocity and pressure drop were studied respectively by single factor analysis. The distribution law of residence time of different oil steam in SVQS were analyzed by employing the scalar transport equation. The simulation result showed that the dimensionless tangential velocity of oil steam in SVQS increased as the density increasing or decreasing of viscosity and the maximum dimensionless tangential velocity can reach 0.912. Both density and viscosity had logarithmic function relations with the dimensionless maximum tangential velocity. The residence time of oil steam in SVQS reduced with the increasing of density of oil steam or the decrease of viscosity that the minimum average residence time was 6.279 s. It was found that the pressure drop and drag coefficient were not only affected by the structural parameters of the SVQS system, but also impacted by the viscosity of oil steam. Both pressure drop and drag coefficient had a logarithmic function relationship with the viscosity of oil steam. Meanwhile, the formulas of dimensionless tangential velocity, pressure drop and resistance coefficient related to oil steam parameters were obtained by fitting, which had good universality and can provide data for the structural optimization of SVQS system.