The invention relates to an ignition device for a high-power industrial gas boiler burner, aims at solving the technical problem of poor interference resistance of the existing gas ignition device, and belongs to the technical field of industrial boilers. The ignition device is characterized in that a gas inner tube is arranged in an anti-interference outer tube; the gas inner tube and the anti-interference outer tube are coaxially arranged and insulated and isolated from each other; the tail end of the gas inner tube is connected with an electrode contact; a spark needle is arranged transversely in the diameter direction of the anti-interference outer tube; the two ends of the spark needle are fixedly connected with a tube wall of the anti-interference outer tube; the spark needle is parallel to the outlet end surface of the gas inner tube and is separated from the outlet end surface of the gas inner tube by a gap; one end of the anti-interference outer tube is flush with the tail end of the gas inner tube; the length of the other end of the anti-interference outer tube extends outwards along the outlet end of the gas inner tube; and a plurality of outer tube grooves are formed in the end parts of the anti-interference outer tube axially. The ignition device has the positive effects that the root of a flame is located in the anti-interference outer tube and free from the interference of the external environments, an outer flame is located outside an outlet of the anti-interference outer tube, and air outside the anti-interference outer tube can enter the anti-interference outer tube through the outer tube grooves, so that the air required by gas burning is supplemented, and the stable burning of the root of the ignition flame is ensured.