For Heishazhou waterway bending,branching,branch and other characteristics,combined with the proposed suitable dam layout scheme,we use a two-dimensional mathematical model to calculate the flow distribution ratio of branching channels respectively under the conditions of the different longitudinal dike dam and jetty head angle layout,analyze the calculation results under the different arrangement conditions,and summarize the change rule of diversion ratio to obtain the layout optimization arrangement scheme.Heishazhou waterway divides into three channels of the south,middle and north.The right slot of south channel is the main navigation channel,and the flow distribution ratio of right slot increasing is a key point of waterway regulation project.The calculation analysis of the dam and jetty head angle can provide theoretical basis for the layout scheme of optimization.