The invention discloses an ocean engineering foundation adopting a pile-barrel foundation structure, wherein a first pile-sinking and then barrel-sinking method and a first barrel-sinking and then pile-sinking method are adopted. After the pile-barrel foundation structure is sunken into a seabed soil layer, upward-pulling, downwards-pressing and horizontal loads are resisted by using a special node structure so as to maintain the stability of a foundation structure; and the engineering property of the pile-barrel foundation is combined with the mechanical design performance to perform structural reinforcement on the combined part of the pile and the barrel. The ocean engineering foundation disclosed by the invention not only can be used for exerting favorable vertical bearing capacity of a pile foundation, but also retains the favorable capability of the barrel foundation in resisting a horizontal load. The ocean engineering foundation can make the two foundations complement the advantages of each other, and has favorable development prospect and a value for deep engineering research.