The invention discloses an adjustable glass edge-grinding machine, which comprises a bottom plate. A cylinder is arranged in the middle of the upper end of the bottom plate, a rotating motor is arranged at the cylinder bottom of the cylinder, and an output shaft at the upper end of the rotating motor is fixedly connected with the bottom end of a rotating shaft through a coupling; a rotating disc is arranged at the top end of the rotating shaft, and an annular sliding block is arranged on the bottom face of the rotating disc and slidably connected with an annular groove in the upper end of thecylinder; and a fixing device is arranged at the upper end of the rotating disc, and a glass body is arranged at the upper ends of suction cups in the fixing device. The adjustable glass edge-grindingmachine is convenient to operate and complete in function and brings great convenience to using of a user; and edge-grinding glass is fixed firmly and positioned rapidly through the fixing device anda positioning device according to the using demands, the edge-grinding quality of the glass is ensured, the working burden of personnel is relieved, the labor expenditure cost is saved, and the edge-grinding efficiency of the glass is improved.