The invention discloses a coal constant-speed screening material-throwing breaking apparatus, which comprises support installation plates, wherein the edges of the upper ends of the support installation plates are vertically and upwardly arranged with an arc surface installation cylinder, the inner middle position inside the arc surface installation cylinder is vertically provided with a driving breaking cylinder matched with the upper ends of the support installation plates, a main transmission rotation shaft vertically and upwardly penetrates through the middle position of the lower end of the driving breaking cylinder and vertically and upwardly penetrates through the support installation plates, the lower end of the main transmission rotation shaft is coaxially provided with an operation gear, the lower ends of the support installation plates on the left side and the right side of the main transmission shaft are respectively, symmetrically and vertically semi-embedded with a synchronous driving motor, and the lower ends of the synchronous driving motors are respectively and coaxially provided with a synchronous driving gear matched with the operation gear through motor rotationshafts. The coal constant-speed screening material-throwing breaking apparatus of the present invention has advantages of compact structure design, stable transmission process, reasonable cycle design, high breaking efficiency, good breaking quality and the like.