Floating Dock has a special structure. It has a huge concave-shaped cabin with walls on both sides and open front and rear ends. It is a trough-shaped boat with a special structure. The wall, dock and bottom on both sides are box-shaped structures, and are divided into several closed compartments along the longitudinal and horizontal directions. Some compartments are called water tanks, which are used for irrigation and drainage, and make the dock sink and float. In addition to ensuring buoyancy, the bottom tank can also support ships.

The role of the dock wall is to ensure the necessary rigidity and qualitative stability of the floating dock in the ship, and provide the space required for production.

Today's Floating Dock is generally used more in the military, but also in other places in need.