Based on the analysis of domestic and overseas practical cases of wharves and discussion on the determination methods for the liquid bulk cargo terminal in the codes for port construction of English, America, Japan and OCIMF (Oil Companies International Marine Forum), it is pointed out that for wharves in the open sea, the restrain in the transverse direction is more important than in the longitudinal direction; The adoption of larger horizontal angle and moderate length of the mooring line can effectively reduce the berth length; The berth length can be determined by 1.1～1.3 times of the typical vessel length for a single berth in the open sea.