The utility model discloses a sunlight room framework angle rotating device. The whole set of device comprises an angle sectional pipe, sectional plates, framework sectional pipes and fixing screws, wherein an inner cavity of the angle sectional pipe is separated into two hollow parts by a middle separation plate, one connecting inclined surface is respectively distributed at the left side and the right side of the upper plane, the connecting inclined surfaces are vertically, downwards and respectively connected with the distributed side surfaces, the bottom of each of the two side surfaces is respectively provided with one support frame, each support frame is provided with a circular arc groove, each sectional plate is in a shape like a Chinese character 'qi', the upper end of each sectional plate is provided with an installing surface, the lower end of each sectional plate is provided with a circular arc strip at the same side, the frame sectional pipes are fixedly arranged at the outer sides of the sectional plates, after the circular arc strips of the sectional plates are embedded in the circular arc grooves formed in the support frames, the installing surfaces arranged at the upper ends of the sectional plates cover the connecting inclined surface of the angle sectional pipe, and after the rotation to a required angle, the angle sectional pipe and the sectional plates are fixed through fixing screws. The sunlight room framework angle rotating device has the advantages that before the installation, a user can select the angle of the rotating angle according to requirements, the angle error can be eliminated through angle regulation during the installation, the structure is novel, the use is convenient, and the efficiency is improved.