The invention relates to a supporting frame for an auxiliary brick unloading device. The supporting frame comprises a bottom plate and a support vertically fixed to the bottom plate. The support is fixedly provided with a motor and further provided with a cross shaft. The cross shaft is connected with the motor and provided with a rotary cylinder. The rotary cylinder is evenly provided with multiple arm frames. The outer ends of the arm frames are each provided with a baffle. A through hole is formed in each baffle. The rotary cylinder is polygonal. The edges of the rotary cylinder are the same as the arm frames in number. Bolt holes are evenly distributed in the rotary cylinder. According to the supporting frame, the polygonal rotary cylinder is adopted for driving the arm frames to rotate, the working efficiency of mechanical hands in the arm frames is improved, and good supporting is provided for smooth operation of the mechanical hands; and evenly-distributed arm frames are beneficial to lowering the torque generated on the support when the mechanical hands in the arm frames grab bricks, and thus the stability of the device is kept beneficially.