Curtain wall torsion external sunshade system

The utility model relates to the field of cables, and discloses a curtain wall torsion external sun-shading system which comprises an upper sun-shading system, the upper sun-shading system comprises a plurality of torsion curved surface sun-shading plates, torsion keels are arranged in the torsion curved surface sun-shading plates, and each torsion keel comprises a skeleton shaft. The torsion angle of the torsion curved surface of the torsion curved surface sun shield is determined by the torsion angle of the bone shaft. Rotation and torsion angle adjustment of the torsion curved surface sun shield are jointly achieved through torsion of the torsion curved surface of the torsion curved surface sun shield, changes of the internal torsion keel and changes of the position of the supporting component on the curtain wall, and the sun shield can be gradually changed into the transverse state from the vertical state through the torsion curved surface on the torsion curved surface sun shield. And the horizontal state