An adjustable mobile phone support comprises a bottom plate, a rotating shaft, an inclined plate, a supporting plate, a spring and a mobile phone clamping base, a large groove is formed in the bottomplate, a plurality of small grooves are formed in the large groove, and a bottom plate rotating column is arranged at one end of the bottom plate; a clamping round groove is formed in the upper side of the inclined plate, an inclined plate rotating column is arranged at one end of the inclined plate, a large round groove and a square groove are formed in the lower side of the inclined plate, a through hole is formed in the large round groove, and a rotating round hole is formed in the front end of the side wall of the square groove; rotating cylinders are arranged on the two sides of the frontend of the supporting plate. A small cylinder is arranged on the lower side of the mobile phone clamping base, a round rod is further installed on the lower side of the mobile phone clamping base, and a disc is installed at the other end of the round rod; a bottom plate rotating column of the bottom plate is connected with an inclined plate rotating column of the inclined plate through a rotatingshaft; a support plate is mounted in a square groove of the inclined plate, a round rod is mounted in a round hole, and a spring is mounted on the outer side of the round rod. The mobile phone support is simple in structure, small in size, convenient to carry, high in practicability and capable of being widely applied and popularized.