Based on the theoretical control model of end face fluid seal with bidirectional and double row diamond pores textured,the influence law of diamond pores structure,arrangement mode and operating condition parameters on seal performance was studied by method of finite element analysis,and the influence of bidirectional pumping function of diamond pores on dynamic pressure lubrication performance of mechanical seal was studied.The results show that with the increase of the outer pressure,the pressure difference at inside and outside diameters is gradually increased,the open force and leakage rate are increase,and liquid film stiffness is first decreased,then increased,and then decreased.With the increase of the speed,the open force,liquid film stiffness and leakage rate all show a trend of rapid increase.With the increase of basis film thickness,the open force and liquid film stiffness are increased first then decreased slowly,while the leakage rate is increased rapidly.It is shown that the bidirectional tworow diamond pores texture produced in the end faces can suck back the fluid in the gap,reduce the leakage rate and improve the lubrication performance of the end faces gap,the improvement of sealing characteristics is achieved through the arrangement of different diamond pores and the optimal design of structural parameters.