Flood prevention warning device with floating assembly

The utility model discloses a flood prevention warning device with a floating assembly, relates to the technical field of warning devices, and aims to solve the technical problems that in the prior art, a warning device is inconvenient to install, carry, float and use and is not easy to observe at night, the warning device comprises a plastic floating bottom plate; a portable warning supporting plate assembly is arranged at the side end of the plastic floating bottom plate, a lifting supporting assembly is arranged at the upper end of the plastic floating bottom plate, a plastic warning mounting barrel is arranged at the upper end of the lifting supporting assembly, a flood situation detection assembly is arranged in the plastic warning mounting barrel, and a warning horn is arranged at the side end of the plastic warning mounting barrel. The upper end of the warning horn is fixedly connected with a warning lamp, the interior of the portable warning supporting plate assembly comprises a floating lower support