A bottom groove body of the
composite material bottom groove is of a groove-shaped structure, the upper portion of the groove-shaped structure is open, the width of the groove-shaped structure is gradually reduced from top to bottom, and therefore the
composite material bottom groove and a pedal which are easy to stack can be stacked in the transportation process. Therefore, the space of the cargo compartment can be fully utilized, the
transportation cost is greatly reduced, meanwhile, the
composite material bottom groove and the pedal which are stacked into a
pile and are easy to stack can be directly stacked in the cargo compartment, a special goods shelf does not need to be adopted, the
transportation cost is further reduced, the loading and unloading processes are reduced, and the loading and unloading convenience is improved. The modularized buoys of the multifunctional floating body
assembly are spliced into a platform structure or a latticed structure or an annular structure which is distributed in the horizontal direction through a plurality of connecting pieces, so that various overwater floating bodies such as an overwater platform, a floating valve and an
aquaculture floating mat can be obtained through flexible splicing, and the multifunctional floating body
assembly is good in universality, high in structural strength and good in
weather resistance.