Based on self-propelled ship model test,the paper studies the scale and ship navigation mode of interference area for ships to meet in the intermediate channel between two single channels.The result shows it is reasonable that the intermediate channel interference area connects with the navigation structures through oblique guide wall,and the transition is more than 2 times length of the captain.The intersection area width and ship navigation mode is determined by referring to the relevant standards and design specifications in order that one line ship berthed can smoothly meet another line ship sailing at a normal speed in the interference area,and the ability and security to navigation is improved.