With the regulation project in Dongliu waterway,the overall regime is basically under control and channel conditions are obviously improved.However,the evolution analysis of Dongliu waterway shows that the quick increase of diversion ratio in the East channel in recent years leads to sedimentation on the left side of the Tiger beach and the width stress on west transition section of west port.If these adverse trends continue,not only the regulation effect will be seriously weakened,but also new navigational problems will occur.The thought of taking west port as the main channel for regulation is confirmed again and the regulation scheme is put forward.