An automatic bristle plate binding machine comprises a cleaning and mixing device, a conveying and carding device and a binding and forming device, which are installed on a rack. The cleaning and mixing device comprises a cleaning pool, a mixing drive motor, a plurality of transmission wheels, a mixing rod driving wheel and a mixing rod. The conveying and carding device comprises a conveying and carding drive motor, a plurality of transmission wheels, a conveyer belt, a primary forming pulley, a secondary sizing pulley and a metal comb. The binding and forming device comprises a binding support, a secondary binding support frame, a forming support, a binding drive motor, a plurality of transmission wheels, a plate binding pulley, a plate binding rope, an upper-lower position regulation control device, a left-right position regulation control switch, a rotating pulley, a forming pulley and a binding and forming hollow shaft. The machine overcomes the disadvantage that the traditional handwork is heavy in labor intensity and low in efficiency. The machine replaces the traditional handwork, is convenient to be maintained and is stable and reliable, and the product is good in straightness, thus alleviating the labor intensity of workers and greatly improving the production efficiency.