For a linearly arranged wharf consisting of operation platform，mooring dolphins and steel catwalks，the conventional design approach considers the independent stress of the three structures，weakening the transfer of forces between them.This paper proposes an integrated structural design scheme of mooring dolphin and steel catwalk suitable for a specific layout from the perspective of collaborative force among the three parties.The specified structure and force analysis method are introduced along with engineering example.A comparison is made between the integrated structure and the traditional high-piled dolphin structure in terms of force distribution and engineering costs.The results show that under the premise of meeting the functional requirements，the integrated scheme effectively leverages the overall force advantages of the structure，reduces the quantity of mooring dolphin and steel catwalk，and subsequently lowers the engineering cost.