Oil-air lubrication is the most effective cooling and lubrication method for high speed spindle.However,to achieve the best lubrication effect,accurate oil air lubrication parameters must be set for different types of bearings and different working conditions.This requires reliable experimental equipment to conduct a large amount of experimental analysis.An experimental platform was built to simulate the operating conditions of the spindle,the oil-air lubrication system and an oil-air mixing and distributor that combines the functions of oil-air mixer and oil-air distributor were designed.The experimental results show that the optimal speed range of the experimental platform is from 0 to 30 000 r/min,which meets the speed requirements for high-speed machine tool spindle testing.The oil feeding error of the oil-air mixing and distributor meets the industry standard of ±10%,and its service life reaches 120 000 times.Therefore,the established experimental platform and oil-air lubrication system have high reliability in conducting experimental research on oil-air lubrication parameters of high speed spindle.