Some new changes occurred in the distributary reach of south and north channels recently,which threaten the stabilization of the important regulation projects nearby,and may influence the stabilization of the river regime.Based on the comparison of the riverbed data of several years,we analyze the new changes of the distributary of south and north channels recently.The results show that the sediment is silting at the Biandan shoal tail,the Xinxinqiao channel is withering away,the Xinqiao shoal is moving downstream and southwards,some new watercourses are developing on Biandan shoal,etc.The new changes mentioned above threaten the stabilization of the regulation project nearby,such as the Xinliuhe shoal protection project,the Nanshatou gully discharge control project,the reclamation project of Zhongyang shoal,the Qingcao shoal reservoir project,etc.These regulation projects maintain the stabilization of the distributary of south and north channels.