The reconstruction and expansion project of liquid chemical wharf with continuous butterfly shaped multi loading and unloading area has complex boundary conditions，generally limited available shoreline length，multiple berthing ship types，complex and special mooring line layout，and high safety requirements. Although the Mooring Equipment Guidelines published by OCIMF has carried out certain study on the layout of the wharf based on the ship mooring，there are few studies focused on the layout for liquid chemical wharf reconstruction projects. Taking the reconstruction and expansion project of a wharf as an example，the plane layout principles of the reconstruction and expansion project are summarized by analyzing the utilization of the existing wharf.Based on the layout plan of ship mooring lines，the characteristics of ship mooring lines in multi loading dock and optimizing the layout of mooring points are studied. The OPTIMOOR mathematical model is used to verify the feasibility of the plane layout and the departure control conditions are proposed.