Fire extinguishing system for floating roof tank floating boat

The utility model discloses a fire extinguishing system for a floating roof tank floating boat. The system adopts a spraying fire extinguishment method and comprises fire extinguishing spray heads distributed in all spaces of the floating roof tank floating boat and a fire extinguishing pipe network for delivering a fire extinguishing medium to the fire extinguishing spray heads, wherein various pipes in the fire extinguishing pipe network comprise rigid pipes which constitute a framework of the floating boat. According to the fire extinguishing system, the fire extinguishing pipe network and the framework structure of the floating roof tank floating boat are combined together, the weight change of the floating roof tank floating boat is smaller before and after mounting of the fire extinguishing system, and meanwhile, materials are saved.