Device for preventing and controlling algae in water body

The invention discloses a device for preventing and controlling algae in a water body. The device comprises a hull, a reaction device and a power output module, wherein the reaction device is arrangedon the hull; when the hull floats on the water surface, the reaction device is immersed in water and is provided with a water inlet and a water outlet; the water inlet is positioned in one end of thereaction device; the water outlet is positioned in the other end of the reaction device; along with movement of the hull in the water, the water can flow into the reaction device from the water and is drained out of the reaction device from the water outlet; an ultraviolet radiation module is arranged in the reaction device; the power output module can drive the hull to move on the water surface.The device for preventing and controlling the algae in the water body, disclosed by the invention, can move in a designated area; the water nearby the water inlet is enabled to flow into the reactiondevice, is subjected to rad