Burner capable of burning blast furnace gas completely

The utility model belongs to the technical field of burners of blast furnace gas and aims to provide a burner capable of burning blast furnace gas completely without auxiliary fuel ignition. The burner comprises a burner casing, wherein a blower is arranged at one end of the burner casing; a gas main pipeline is arranged on one side of the burner casing; the burner is characterized in that a two-stage air distribution chamber connected with the blower is arranged in the burner casing; a one-stage air distribution pipe connected with the blower is arranged in the two-stage air distribution chamber; a one-stage air adjusting valve is arranged in the one-stage air distribution pipe; a stable combustion air chamber is arranged at the end part of the one-stage air distribution pipe; a one-stage gas supply pipeline is arranged on the gas main pipeline; a primary combustion head at the end part of the one-stage gas supply pipeline is arranged in the stable combustion air chamber; a stable combustion barrel is arrang