The invention discloses a large sunshade folding structure and belongs to the field of manufacturing of articles for daily use. The structure that a worm and a worm gear are matched is creatively adopted, a round base structure unique in structure is designed, and an umbrella surface can be unfolded and folded by only rotating a handle at the bottom, a person can unfold and fold the umbrella surface no matter what the height and width of a sunshade are, and the sunshade is very convenient to use and operate.