Energy-saving ignition oil gun

The utility model relates to a boiler ignition oil gun technology, in particular to an energy-saving ignition oil gun which comprises a fuel oil gun pipe, a first gas ejector pipe and a second gas ejector pipe, the first gas ejector pipe is located inside the fuel oil gun pipe, and the second gas ejector pipe is located outside the fuel oil gun pipe. A first cavity is formed between the first gas ejector pipe and the fuel gun pipe, a second cavity is formed between the fuel gun pipe and the second gas ejector pipe, and a nozzle is arranged at one end of the second gas ejector pipe; a high-pressure air pipe is arranged at the ends, away from the nozzles, of the first air spraying pipe and the second cavity in a communicating mode, an oil inlet branch pipe is arranged at the end, away from the nozzles, of the first cavity in a communicating mode, and stop valves are arranged on the high-pressure air pipe and the oil inlet branch pipe; the output ends of the first gas ejector pipe, the first cavity and the secon