The oil spray lubrication model of a high speed meshing gear system was established and verified through experiments.The simulation analysis of highspeed gear meshing oil spray lubrication was carried out,and the effects of injection system parameters such as spray angle,spray position and injection flow rate on the oil spray lubrication effect were studied.The results show that in a certain range,increasing the spray angle that leans to the small gear is helpful to the oil to inject the tooth space of large gear and then enter the meshing area along with the rotation of the gears,so as to improve the lubrication effect of the gears.When setting the engaging out area as the spay position,the oil will be blew off by the high speed contraflow and unable to enter the meshing area of the gears.Therefor,setting the engaging in area as the spay position is fit for high speed gear transmission.Increasing the injection flow rate can improve the oil’s ability of resisting the high speed airflow and mitigate the deflection of the oil streamline.Increasing the injection flow rate can also improve the oil volume fraction on the gears’ meshing faces and finally improve the lubrication condition of the gear meshing.