Guichi channel is a multi-level and multi branching channel. In recent years，the beach channel pattern has changed significantly，forming a double channel pattern，and the channel conditions are developing in an unfavorable trend. This paper analyzes the recent riverbed evolution and navigation obstruction characteristics. Following the regulation idea of restricting the development of north port，stabilizing the branching pattern of branch，and consolidating the position of main branch and main channel of China port，this paper proposes a preliminary channel regulation scheme. Through the fixed bed and movable bed model test，the scheme effect is compared and analyzed，and the test results are compared. The results show that the scheme of comb-type beach protection for the head of Chongwenzhou bar and bottom protection for Xinglongzhou right channel in Beigang is better.