The invention relates to a valve with an adjustable air intake direction, in particular to a valve with adjustable air intake direction capable of rotating along the radial direction. The valve with the adjustable air intake direction comprises an air inlet seat capable of rotating in the radial direction and a valve plug capable of rotating in the radial direction, wherein the valve plug consists of an annular air intake groove, a radial air outlet hole and a handle; the air inlet seat is fixed with a valve seat by a fixing seat in a threaded way; the valve plug is fixed with the fixing seatby a fastening nut; the fixing seat is provided with an annular groove and an opening pore; the rotation angle alpha of the air inlet seat is 0 to 360 degrees; and the rotation angle of the valve plug is 0 to 360 degrees. The valve with the adjustable air intake direction has the advantages that an air source connecting port is reversely adjustable within 360 degrees and that the direction of theair stream entering a furnace can be adjusted within 360 degrees. Therefore, the valve with the adjustable air intake direction avoids the phenomenon of dead angles of furnace gas caused by the fixedair stream direction, improves the protective capability of the furnace gas and ensures product quality.