The invention discloses an unmanned water body eutrophication treatment boat. The unmanned water body eutrophication treatment boat comprises a power steering system, a GPS, a radar system, a water quality detecting device, a power supply device, an air injection device, an ultraviolet system, a fishing system and a central processing unit, wherein the central processing unit serves as a center, and is separately connected with the various portions; the central processing unit works out an optimum navigation route and speed through signals transmitted by the radar, the GPS module and the waterquality detecting device, and transmits signals to the ultraviolet system, the air injection system and the fishing system to enable the ultraviolet system, the air injection system and the fishing system to work. Water body eutrophication can be treated rapidly and conveniently without manual operation, the labor investment is reduced effectively, potential safety hazards are reduced, the working efficiency is improved, and the unmanned water body eutrophication treatment boat adapts to development of the social technology.