Lianshitan is a well-known complex rapids in the upper Yangtze River,with the navigation obstacle character of shallow,dangerous and large velocity in the dry season.Riverbed evolution and flow characteristics are analyzed.Based on the navigation obstacle character and navigation hindering causes of Lianshitan,the regulation schemes is proposed.The research results can provide for waterway regulation of the separated type rapids made of non-rock，which is shallow but large velocity and large gradient ratio in the dry season.