This paper is to improve the tribological properties of water lubricated bearings. In this paper, the fluid-structure coupling method is used to study the water-lubricated bearing with the compound dimple, and the porous structure with the bionic diatom (rectangular-hemispherical compound dimple) is applied to the high pressure region of the bearing. The tribological characteristics of water-lubricated bearings with the rectangular-hemispherical compound dimple under different loads, texture widths and spacing were analyzed. It can be seen from the experimental results by comparing with smooth bearing and single- layer textured bearing, it can be seen that with the increase of load, the bearing capacity of rectangular-hemispherical compound dimple bearing increases and the friction coefficient decreases, and it has the maximum bearing capacity and the minimum friction coefficient. With the increase of the width of the first layer and the second layer, the bearing capacity of the compound dimple bearing has a complex fluctuation, but generally presents a rising trend, the friction coefficient presents a declining trend. When the spacing is small, the tribological performance of compound dimple bearings is better. When the spacing is constant, there is an optimal number of dimples to minimize the friction coefficient of the bearing. Therefore, the water-lubricated bearings with the rectangular-hemispherical compound dimple are suitable for working under heavy load conditions. When the dimple size is large, it can produce better tribological properties. When the spacing is small, the tribological properties of compound dimple are better, and there is an optimal number of dimples.