For the channel improvement project with the shiplock enduring bilateral water head action or to meet the needs of specific-period flood control required by water administrative sector,sometimes it need be equipped with open shiplock to hold the back water.As the shiplock’s passing capability is generally less than that of channels,which is likely to create the bottleneck of navigation,the shiplock passing capability becomes a key point of channel improvement projects.Taking Danjin shiplock as a research object,this paper analyzes and compares the electro-mechanical system of the gate,water supply system and layout plan with a view of giving reference for carrying out similar projects in water networks of plain areas and improving shiplock standards and norms.