Abstract: An automobile sun-shading device, comprising a mounting seat, a piece of sun-shading cloth, and a bracket for driving the sun-shading cloth to unfold, wherein the bracket comprises a first bracket and a second bracket movably connected to the first bracket, one end of the first bracket is mounted on the mounting seat, the other end of the first bracket is movably connected to one end of the second bracket, the other end of the second bracket is connected to one end of the sun-shading cloth, the other end of the sun-shading cloth is wound on a rotary shaft, and the first bracket and the second bracket each comprise a foldable connecting rod capable of being automatically unfolded. The sun-shading device is exquisite in structure and better in sun-shading effect.