The utility model belongs to a liquid level floating device and discloses a floating body for controlling liquid level flotage floating region equipment and a fence formed by the floating body. The floating body is used for floating objects in liquid or bearing additional facilities; the fence is used for controlling the floating regions of liquid level overflow oil, enteromorpha prolifera, aquaculture floating plants and the like. According to the utility model, the technical problems that the existing inflatable floating body and fence are troublesome to use and fold, the filling type floating body with fixed structure and the fence are inconvenient to transport and store, and the fence body erected by counterweight is complicated in structure and troublesome to use, fold and store are solved by adopting the technical scheme that floats are located at the two sides in the longitudinal direction of a float main body, one end of the float is hinged with a main floating body, the floating body is placed in the liquid, the other end of the float floats, the weight of the floating body below the liquid level is larger than the weight above the liquid level, and the adjacent floating bodies are detachably connected into a whole through quick joints to form the fence.