The temperature rise，friction torque and friction coefficient of a laser-textured mechanical seal with a dimple face are much smaller than those of a conventional mechanical seal，and the abilities of anti-wear and working under high pressures are improved.A theoretical analysis model for a laser textured mechanical seal was developed，by which the sealing performance of a new type of such seals with a porous sector face was analyzed.The dimensionless fluid film pressure distributions between the two mating faces with different sector dimension parameters and microdimples geometry parameters were obtained by solving the Reynolds equation with the finite element method.The sealing performance parameters were calculated and analyzed，such as film stiffness，opening force，fluid leakage，frictional torque，the ratio of stiffness to leakage，and the ratio of opening force to leakage.The results showed that the most excellent sealing performance could be obtained when the textured length ratios both in the radial direction and in the circumferential direction were 0.6，the textured multipore area density was between 0.2 and 0.3，and the ratio of dimple depth to dimple diameter was between 0.010 and 0.015.