Full-ceramic ball bearings are widely used in the field of aerospace,gas engines and extreme working conditions,however,the research on lubrication characteristics of all-ceramic bearing oil is relatively rare.Silicon nitride 6206 full-ceramic deep groove ball bearing was taken as the research object,the experimental study on lubrication characteristics of ceramic bearings was carried out on bearing vibrometer.Using quasi-statics and minimum oil film thickness theory,the accurate numerical solution was obtained by Newton iteration method of MatLab.The relationship among contact stress,contact angle,axial load,centrifugal force and minimum oil film thickness of ceramic bearings was analyzed,and the vibration law of ceramic bearings under different working conditions was obtained by changing oil supply and axial load.The experimental results show that the contact stress between the ball and the bearing outer ring is larger than that between the ball and the bearing inner ring under the same axial load.The axial displacement increases with the increase of axial load.When axial load is constant,there is an optimal oil supply to minimize bearing vibration.Under dry grinding condition,the vibration of bearing first increases and then decreases with the increase of bearing load.