The friction characteristics of automobile shock absorber oil seal were studied by combining numerical simulation with experimental verification,the variation law of friction force under different working conditions was obtained.The friction experiment of automobile shock absorber oil seal was carried out on the reciprocating oil seal friction testbed to study the variation law of friction force with lubricating oil temperature,lubricating oil pressure and piston rod speed.The results show that with the increase of piston rod speed,the friction force increases first,then decreases and then tends to be stable,with the increase of lubricating oil temperature,the friction force decreases gradually,and with the increase of lubricating oil pressure,the friction force increases gradually.According to this change rule of oil seal friction force,it can be inferred that when the piston rod speed is low,the lubricating oil temperature is high and the lubricating oil pressure is low,a large interference or holding force of shock absorber oil seal used in different working conditions can be set to improve the performance and service life of automobile shock absorber.The experimental results are basically consistent with the numerical simulation results,which verifies the correctness of the mixed lubrication numerical model.