This paper introduces the characteristics and design method of an integrated precast pile cap and analyzes its structure and connection mode through theoretical analysis and numerical simulation.According to the conclusions, all-vertical-piled wharfs can generally facilitate the installation of the pile cap, and concrete grouting inside the pile can improve the overall lateral stiffness.The structure design of the pile cap can refer to the current structure design code of wharfs.In addition, socketed grouting can connect the pile cap and steel pile, with ultra-high performance concrete as the grouting material, and relevant overseas codes can guide the calculation of the grouting length according to the grip force.In the case of large axial forces, the setting of shear keys in the grouting area can increase the bonding force.