Abstract: The disclosure discloses an overturning and supporting rotating shaft for a tablet computer. The overturning and supporting rotating shaft includes a fixed support, wherein a connecting fixed part is arranged in the fixed support; the connecting fixed part includes a fixed portion, and an arc-shaped installing portion is connected to one side of the fixed portion and is inserted into a connecting plate; a first arc-shaped installing groove is formed in the connecting plate; the connecting plate is inserted into a movable support, and a second arc-shaped installing groove is formed in the movable support; a torsion washer is arranged between each side of the movable support and the fixed support. The rotation of the overturning and supporting rotating shaft within a range of 120 degrees is realized by matching of arc-shaped structures among each assembly, and movement assisted by connecting the torsion gaskets and the fixed support.