The invention discloses a spray tower for an air purification furnace, belonging to the technical field of spray towers. The spray tower of the invention solves the problems that the air flow uniformly-distributing effect of the spray tower of a conventional air purification furnace is limited, and the air flow distribution in the spray tower is still not uniform. The spray tower for the air purification furnace of the invention comprises a flow dividing disc and a flow dividing column, wherein the bottom of the flow dividing disc is fixedly connected to one end of an air inlet pipe, and the air dividing column is inserted into the outer part of a fixed ring in an interference manner. The air supply mode of the spray tower is that air is supplied from center of bottom, and air flow entering the tower body is uniformly dispersed through the flow dividing disc and the flow dividing column, so the waste gas in the tower body can uniformly contact and react with liquid sprayed by double-layer spraying rods; and thus, the problems of non-uniform air inflow of the spraying tower of the traditional air purification furnace and overlarge wind speed difference at different positions are solved, the reaction in the tower body is more sufficient, and the practicability of the spray tower is improved.