Solar backboard supporting portion

A solar backboard supporting portion comprises a curve tube, positioning support bases and reflector backboards. The solar backboard supporting portion is characterized in that the positioning support bases are arranged on the curve tube, the reflector backboards produced by the ABS (acrylonitrile-butadiene-styrene) injection molding method are mounted on the positioning support bases, and each of the reflector backboards is in the shape of a slot type parabolic curve. The reflector backboards are produced by the ABS injection molding method, and reflectors are mounted on the reflector backboards, so that the curves are accurate. A rectangular square tube is pressed into a curve, and the positioning support bases are provided, so that simplicity and easiness in mounting and positioning are realized, strength is greatly improved as compared with that in the prior art, the curve can be guaranteed well when the tube is loaded, condensation effect is improved, and daylighting rate and heat accumulation quantity are further increased.