The utility model discloses a circular smelting furnace of end joint air feed formula in top, including furnace body, a secondary air channel and air -supply line, set up a secondary air inlet pipe bottom the furnace body, the top is provided with the air -supply line, and the wind that comes from two relative orientations is formed with the law vortex in the furnace body, aggravated the reaction in the stove, makes the material misce bene that gets into the furnace body internal reaction, gets rid of and smelts the dead angle. The utility model discloses simple structure, bottom and top be the air inlet simultaneously, makes the rapider and abundant reaction of reactant in the furnace body for change material speed, practiced thrift energy consumption and time.