The invention relates to a burner of a barbecue oven. The burner comprises a burning pool; an ignition bar sleeve is connected to the lower end of the burning pool; an ignition bar is sleeved with theignition bar sleeve, one end of the ignition bar is located outside the ignition bar sleeve, and the other end of the ignition bar extends into the burning pool; a feeding hole is formed in the sidewall of the burning pool and located at the upper end of the ignition bar sleeve; and a plurality of ventilation holes are formed in the side wall of the burning pool and all located at the front endof the longitudinal section of the burning pool. The burner is simple in structure and convenient to use; the multiple ventilation holes are formed and all located at the front end of the longitudinalsection of the burning pool, so that the single air direction is achieved, and the air force is strengthened; the flashback problem is avoided, and sufficient burning is achieved; the temperature canbe better increased, the time of increasing of the temperature to a set temperature is shortened, consumption of fuel is reduced from the side, and thus the fuel is saved; and people can enjoy barbecue in a shorter time.