The invention belongs to the technical field of marine antifouling materials, and particularly relates to a bionic array structure surface antifouling drag reduction material, which is characterized in that a surface structure is prepared from a resin material by referring to a human pagoda tree duckweed leaf surface microstructure, a bionic structure head is grafted and modified by using a silanecoupling agent and nano SiO2, and a PDMS casting method is adopted to obtain a root hydrophobic property. The antifouling and drag reduction effects are achieved through the structure and hydrophobicity of an organic silicon material, an underwater air layer can be formed on the surface of the material after the material is put into seawater, and the array structure and the air layer can play roles in resisting biological attachment and reducing drag, due to the special structure and surface characteristics, the preparation method is simple, the raw materials are easy to obtain, the bionic cross annular column head structure and the hydrophobic characteristic are achieved, the bionic cross annular column head structure can be applied to the surfaces of speedboats, UUVs, underwater gliders, ships, underwater vehicles and the like, fouling organism attachment is prevented, running resistance is reduced, ship energy consumption is reduced, and potential application prospects are achieved.