Lianshitan is a well-known complex rapid in the upper Yangtze River,with the navigation obstacle character of shallow,dangerous and large velocity.Based on the navigation obstruction characteristics,beach-forming reasons and thought of regulation,combined with the target of regulation,we put forward two schemes for model test according to the different directions of the design waterway.Regulation thoughts of two schemes are dredging navigation and remained stable for Yuqiushi shoal,expanding navigation in the dry season and remained stable in the middle water period for Guandaoqi rapids.The results show that two schemes can both basically solve the navigation obstruction problem,and the second scheme is better in adapting to the river regime,route selection and regulation effect.