The invention discloses an auxiliary arm bracket, which can play an effect for carrying the car and reducing the force and move adaptively along the arm. The auxiliary arm bracket comprises an arm support assembly, a supporting rod assembly, a connecting arm assembly and a fixed seat assembly for forming support which are successively connected with one another, wherein the arm support assembly comprises an arm support connected to the supporting rod assembly in a rotating manner by virtue of a first pivot, and an angle formed between the axis of the first pivot and the vertical direction is greater than 0.