Abstract: Hydraulic oil viscosity is one of the key factor that affects the oil-film bearing capacity and temperature rise. In order to study the impact of different viscosity effects on oil-film thermal properties, oil cavity pressure and oil-film temperature rise are analyzed under the conditions of constant viscosity, temperature viscosity, pressure viscosity, temperature viscosity and pressure viscosity effects by using Fluent software. And thermal properties detecting system is designed to carry out experimental verification. The results shows that oil-film thermal properties analysis with the temperature viscosity and pressure viscosity effects are more close to engineering practice, the impact of temperature viscosity effect on oil-film thermal properties is greater than that of pressure viscosity effect, the oil-film has relatively higher bearing capacity and lower temperature rise when the hydraulic oil temperature viscosity value is 3 910. The research results will provide reference for application regulation of static pressure turntable, technical guidance for structural design and hydraulic oil selection.