The river reaches from Kangtan to Yingpantan in Zhongwei of Ningxia，the mainstream of the Yellow River，is about 9 km long，wide and narrow in plan，and has the shape of a lotus root joint.Considering the problems of channel curvature，bifurcations，unknown channel，violent turbulence in the river reaches from Kangtan to Yingpantan，we use the river model test to analyze and research the effect of channel regulation by dredging the shallow area and widening the channel，and optimize the design scheme according to the test results.It is found that the bending radius of the newly opened fairway at Zhongning Bridge beach is more than 550 m and the upstream and downstream fairways are smoothly connected with each other，and at Taiping beach，the rehabilitation measures of dredging，impoundment and slot filling are carried out，which can effectively improve the flow conditions and ensure the safety of navigation.