Manyusha shallow is located at the Kouan straight reach, which is an underwater braided channel. Manyusha shallow is one main navigation obstacle shallow in the Yangtze River downstream. Based on the analysis of riverbed evolution and the physical model test, we analyze the evolution characteristics of Manyusha shallow in the recent period and the navigation obstacle characterisitcs and the causes, and establish the regulation idea and regulation engineering scheme of Manyusha shallow. According to the results of the model test, we analyze the regulation effects after the implementation of the recommended project and the effects on the river regime of Yangzhong reach.