The invention discloses an apparatus for preventing material jamming of a blanking chute. An installing hole is arranged in the sidewall of the blanking chute, and a shift fork guiding sleeve is installed in the installing hole. A shift fork guiding rod is installed in the shift fork guiding sleeve, and the upper end of the shift fork guiding rod is connected with a drive unit. The lower end of the shift fork guiding rod is hinged to a shift fork in the blanking chute. The drive unit comprises a motor and a cam fixed on a motor bearer and a return spring, and the motor bearer is installed on the outer sidewall of the blanking chute. The cam is connected on the output shaft of the motor, the upper end of the shift fork guiding rod sleeves a return spring, and the upper end portion of the lower shift fork guiding rod, under the effect of the return spring, always contacts with the cam. When moisture and sticky materials fall onto the bottom steel plate of the blanking chute from a belt or other conveying device, the reciprocating moving shift fork separates the materials and the bottom steel plate once the materials attach to the bottom steel plate instantly. In this way, materials are not sticky and accumulated.