The invention discloses a humidity-adjustable heating radiator. The humidity-adjustable heating radiator comprises a bracket, two sets of heating radiator bodies, a humidifying box and a cover body, wherein the bracket consists of 12 connecting rods; the two sets of heating radiator bodies are respectively arranged on two adjacent side surfaces of the bracket; a water inlet of one set of heating radiator bodies is communicated with a heating medium water inlet pipe, and a water outlet of one set of heating radiator bodies is communicated with a water inlet of the other set of heating radiator bodies; a water outlet of the other set of heating radiator bodies is communicated with a heating medium water outlet pipe; the internal of the humidifying box is hollowed; multiple first through holes are formed in the top of the humidifying box; the humidifying box is provided with a convex column; the cover body is cylindrical, and is laid on the humidifying box; the convex column is inserted in an inner ring of the cover body; multiple rows of second through holes are spaced on the cover body; and the second through holes are equal to the first through holes in number, and are selectively opposite one to one. The humidity-adjustable heating radiator can adjust indoor temperature and humidity as needed, and is convenient to operate.