Outer folding screen rotating shaft of mobile phone

The utility model relates to a mobile phone outward folding screen rotating shaft which is provided with a connecting base. Connecting plates are arranged on the two sides of the connecting base, a plurality of rotating assemblies are arranged on the connecting base, the connecting plates on the two sides are rotationally connected to the connecting base, each rotating assembly comprises a limiting plate, a positioning shaft, a rotating plate, a sliding plate and a reset spring, and each rotating plate is rotationally connected to the corresponding positioning shaft; the sliding direction of each sliding plate is parallel to the axis of the positioning shaft, first convex tooth parts circumferentially distributed on the sliding plates along the axis of the corresponding positioning shaft are arranged on the faces, away from the reset springs, of the sliding plates, and second convex tooth parts corresponding to the first convex tooth parts and capable of being connected with the first convex tooth parts in a