Fireproof system of gas turbine

The utility model relates to the fire prevention technology of gas turbines, and particularly discloses a fire prevention system of a gas turbine, which is applied to a combined cycle power plant comprising the gas turbine and a steam boiler and comprises a boiler steam-water system for outputting high-pressure steam; the fire alarm detector and the steam nozzles are arranged in the working cover chamber; the boiler steam-water system is higher than each working cover chamber; the steam pipeline is communicated with the boiler steam-water system and the steam nozzle; the electric valves are arranged on the steam pipeline; and when the fire alarm detector detects a fire alarm signal, the electric valve is controlled to be opened, so that high-pressure steam output from the boiler steam-water system flows to the steam spray head along the steam pipeline and is sprayed out from the steam spray head. The existing steam boiler in the combined cycle power plant is used for fire prevention and extinguishment of the