In order to obtain the optimal surface texture distribution parameters,taking the spherical crown pit texture model as the research object,and selecting the unequal rectangular control unit,the surface texture distribution model with different horizontal and vertical distribution distances (densities) was established.According to the principle of fluid dynamic pressure lubrication,the twodimensional Reynolds equation was established based on the Navier-Stokes equation and solved by the multigrid method.Taking the average oil film pressure and oil film pressure peak as the evaluation indexes of dynamic pressure lubrication performance,the effects of the surface texture distribution interval on the oil film pressure value and the oil film pressure stability were studied,and the mechanism of the influence of the surface texture distribution interval on the oil film pressure was studied.The results show that the average oil film pressure in the control area is increased gradually and then decreased slowly with the increase of the side length of the pit control unit.When the side length of the textured unit is 3.4 times of the pit radius and the aspect ratio is 0.82,the optimal oil film bearing capacity can be obtained.The stability of oil film pressure can be effectively improved when the control unit of the boundary pit is properly increased to make the distance between the left and right sides of the pit at the boundary be about 3.4 times of the radius of the pit.The variation of the pumping action and the ratio of the affected area to the controlled area results in the influence of the spacing of the surface texture distribution on the oil film pressure.