By introducing a cross-scale composite texture combining large-scale grooves and small-scale micropores on the surface of the sealing pair,a composite textured mechanical seal end face combining elliptical micropores and T-shaped grooves was proposed,and a lubricating film fluid model was created.A mathematical model was established according to the mass conservation cavitation boundary conditions,and the finite element method was used for numerical solution.The influence of the composite of elliptical micropores of different length and short axis ratios and T-shaped grooves on the sealing performance was studied,and the optimal composite configuration was determined.The variation of the sealing performances such as opening force and leakage of different textured end face seals under different operating conditions was compared and studied.The results show that the optimal composite configuration is a combination of elliptical micropores with length and short axis ratio of 1.8 and T-shaped grooves.Under the same operating parameters,the cross-scale composite textured end face seal has stronger dynamic pressure lubrication effect,lower leakage,higher liquid film opening force and better overall sealing performance than a single texture.The results of the study can be applied to the design and optimization of the textured friction face of the mechanical seal.