The computation of minimum film thickness,local flash temperatures and safety factors against micropitting of gears for wind turbines was carried out by ISO/TS 6336-22 and thermoelastohydrodynamic (TEHD) analysis method with the consideration of the effect of pressure on viscosity.The lubricant film pressure distributions and film shapes at main contact points were compared.The results show that the minimum film thickness calculated by TEHD contact theory is higher than that calculated by ISO/TS 6336-22,but the safety factors against micropitting is lower.The effect of pressure on viscosity should be considered in the TEHD analysis of the gears for wind turbines.The film thickness on the meshing surface of the main gearbox of wind turbines will decrease rapidly with the increase of temperature and the minimum film thickness will decrease rapidly with the increase of load,therefore,a adequate lubrication should be ensured for the gearbox of wind turbines,and the gearbox should avoid longterm continuous operation above the rated load