The invention discloses a dual gas-supply oxygen-poor protection ignitor, comprising a mounting rack, a thermocouple, an ignition head and an gas automatic selection nozzle, wherein the thermocouple and the ignition head are arranged on the mounting rack, the gas automatic selection nozzle is fixedly arranged on the mounting rack, the gas outlet of the gas automatic selection nozzle is arranged near to the thermocouple and the ignition head, the gas automatic selection nozzle is provided with a gas inlet and two gas passages, the bottom of each gas passage, which is near to the gas inlet, is provided with a block and a spring which is sleeved on the block, and the elastic forces of the springs in the two gas passages are different. The invention avoids trouble of manual selection when various gases are input through different nozzles, and has high use convenience and safety.