Aiming at the lubrication failure of the contacting mechanical seal of the fuel booster pump,the feasibility of the herringbone groove liquid film seal used in the fuel booster pump was analyzed through multi-physics coupling simulation and experiment.Based on the Reynolds equation considering roughness,energy equation and heat conduction equation,a multi-physics model of liquid film seal was established,and the key performances parameters such as temperature characteristics and leakage characteristics of the seal were analyzed.The sealing performance test was carried out for the herringbone groove liquid film seal.The results show that the average temperature of the herringbone groove seal end face is about 50 ℃ lower than that of the contacting mechanical seal,which is beneficial to the improvement of the seal operation stability.During the test operation,the temperature of the seal is stable,and the leakage is zero,which meets the requirements of the sealing performance for fuel booster pump.