In view of the fact that the eastern channel of Qinzhou Port does not meet the requirements of full tidal access for container ships of 100,000 DWT and above,which restricts the development of ocean-going container transportation in Qinzhou Port,and through comparative analysis and demonstration of many schemes,it is proposed that,on the basis of the original approved two-way channel with tidal limitation for 100,000 DWT container ships,the eastern part of the channel is partially dredged and deepened to meet the standard of full tidal access of 100,000 DWT container ships,and entry of 150,000-200,000 DWT container ships within suitable tidal window,forming a special new type cross section of navigation channel with two different navigation depths,which is called ‘compound cross section’.Combining with the application of virtual navigation marks and port scheduling,the requirements of the ultra-large container ships on the depth of the navigation channel and the requirements of two-way navigation channel for major ship types on the channel width can be met simultaneously in a more economical way.This paper introduces the key points of the design of navigation channel with compound cross section and its supporting aids to navigation for expansion project of the eastern channel in Qinzhou Port,puts forward suggestions on the navigation rules and management measures after the completion of the channel,and summarizes the characteristics and applicable situations of various compound cross sections of navigation channel,which can be used as reference for other similar projects.