This paper compares and analyzes the differences of codes for vessel berthing energy design of harbor between China and Britain,and verifies the result by an engineering example.The study shows that the results calculated by Chinese codes are less than those calculated by British codes.Some influential factors of berthing energy are ignored in Chinese codes.Suggestion about amending some parameters in calculation in Chinese codes is proposed.Meanwhile,this paper may serve as reference for the vessel berthing energy design for harbors abroad.