The invention provides a supporting frame for a large-size screen mobile phone and a tablet personal computer. The supporting frame for the large-size screen mobile phone and the tablet personal computer is used when people watch videos, read, learn, glance over news and the like. The supporting frame for the large-size screen mobile phone and the tablet personal computer is characterized in that a sliding shaft is arranged at the bottom of a sliding arc-shaped plate, a slideway hole is formed in an arc-shaped plate base, the sliding shaft is inserted into the slideway hole, a sliding stop sheet, an adjusting spring and a locking nut are used for locking the end of the slideway hole in sequence, so that the sliding arc-shaped plate and the arc-shaped plate base are connected in an overlapped and sliding mode, and the sliding arc-shaped plate is provided with a V-shaped supporting backup plate, a far-end supporting plate clamping groove and a near-end supporting plate clamping groove. According to the supporting frame for the large-size screen mobile phone and the tablet personal computer, the supporting angle is adjusted through sliding of double arch plates, combination is compact, the center of gravity is low, the area of the hollow portion of the base is large, and the defect that in the prior art, stability is poor is well overcome. The supporting frame for the large-size screen mobile phone and the tablet personal computer is particularly suitable for use on an object which is in the shape of a step with a certain gradient, an object which is in the shape of a groove and other soft objects, and the demand that users need to use the mobile phone and the tablet personnel computer in different environments is met. In addition, the wide upper arc-shaped plate provides restyling design space for supporting frame beautification, the structure is simple, and manufacturing is easy.