The performances of lubricant liquid film of groove-pores coupled mechanical seal are numerical simulated by Fluent, and the effects of depth of groove and pore on liquid film performances are analyzed. The results indicate that dynamic pressure generated by groove-pores coupled mechanical seal is higher than spiral groove mechanical seal, and the highest pressure is at the root of spiral groove. The film pressure, the opening force and the leakage increase first and then decrease with the increases of the depth of groove and pore. The higher ratio of stiffness to leakage is the model of when and . However, The higher ratio of stiffness to leakage is the model of when and .