Large-diameter vertical rock-socketed pile will present a unique force characteristic under the action of horizontal forces such as hydrology and ship load.In recent years，there are relevant indoor scale model tests，but few on-site physical tests.We analyze and study the test process and achievement data by combining a all-vertical pile wharf project under construction in the east coast of Zhejiang，and carry out the horizontal static load test of large-diameter cast-in-place rock-socketed pile solid.The results indicate that the maximum bending moment of large diameter cast-in-place vertical rock-socketed piles subjected to horizontal external forces occurs below the seabed and around 2D?to 3D?within the cover layer.When designing pile foundations，it is important to consider whether the bending bearing capacity at this location meets the requirements，and to independently analyze and calculate the shear bearing capacity of the full rock-socketed section.