Supporting frame for tablet computer

A supporting frame for a tablet computer comprises a base, a connecting plate and a supporting plate, wherein a pull rod A of a drawer shape is arranged at the front end of the base, the pull rod A is connected with two circular rails at the front end of the base through two circular sliding rails, spring bayonets are located on the circular sliding rails, the connecting plate is in shaft connection with the rear end of the base, the connecting plate is in shaft connection with a connecting shaft through a transverse shaft at the front end of the connecting shaft, the connecting shaft is embedded in a circular ring in the middle of the supporting plate through a cylinder which is arranged at the rear end of the connecting shaft and is concaved in the middle, the connecting shaft is movably connected with the supporting plate, pull rods B are arranged on two sides of the supporting plate respectively, rotating plates are arranged on the pull rods B, and a pull rod C stretches out of the lower portion of the su