The utility model discloses a sintering ignition device for automatically clearing tar in a gas pipe. The sintering ignition device comprises the gas pipe, a branch gas pipe connected with the gas pipe, a valve on the branch gas pipe, an ignition gas pipe connected with the valve, a gas regulating valve connected with the ignition gas pipe, and a burner connected with the gas regulating valve, wherein the branch gas pipe and the ignition gas pipe are respectively provided with a steam heater. The sintering ignition device disclosed by the utility model can be used to clear the tar in the gas pipe on line under the condition of not stopping the operation of a sintering machine, in addition, the sintering ignition device is not in contact with gas, does not trigger each component of an ignition furnace, is safe and is convenient to operate, and thus, the operation efficiency is improved, and safety accidents are prevented.