In order to deal with the problems in axial piston pump such as uneven loading of port plate pair, offset load moment of port plate and bad lubrication of port plate pair in low pressure area, textured port plate in low pressure area was studied. An analysis model was established to study the effects of diameter, depth and area ratio of micro-dimple on load carrying capacity and compensating torque. The results showed that the micro-dimples with greater dimple diameter could induce higher load carrying capacity and compensation torque. The optimum dimple area ratio was in the range of 12%~18% and the dimple depth gave an obvious affection on load carrying capacity and compensation torque.