The invention discloses a motor-driven forced discharging screening machine which comprises a screen frame, a screen support arranged in the screen frame, and a dustproof cover arranged at the upper portion of the screen frame. A screen is fixed to the upper portion of the screen support. A speed reducer is fixed to the middle portion of the upper side of the dustproof cover through a support. The speed reducer is fixedly connected with a motor. A rotating shaft of the speed reducer vertically extends to the interior of the screen frame. A fixing frame is arranged at the bottom end of the rotating shaft. The bottom of the fixing frame is provided with a rubber skin in pressing sliding fit with the screen. According to the motor-driven forced discharging screening machine, the phenomenon that meshes of the screen are blocked by materials is effectively avoided, normal running of screening work is ensured, the screening efficiency is improved, and therefore the service life of equipment is prolonged.