In recent years，the number of overseas channel dredging projects has increased. Different calculation standards of the design of the channel bottom elevation brought different bidding costs or implementation costs in EPC projects due to different water depths in channel design. This article describes in detail the influence factors on the design of the channel bottom elevation in overseas channel projects，and makes a comparative analysis of the current European，American mainstream codes and Chinese codes in terms of consideration aspects，value-talking method and the advantages and disadvantages so as to summarize the relative merits and applicability of each code，and also propound advice and direction for Chinese code to “go globally”. According to the demonstrations of the two projects，it is recommended to conduct a comparative analysis through calculations under different codes in designing the channel bottom elevation. After the applicable mainstream code is selected with the design based on port information and conditions，the optimal demonstration should be conducted through the simulation test of ship manipulation.