The invention discloses a bottom blowing furnace charge door sealed charging device. The bottom blowing furnace charge door sealed charging device comprises a double-flap valve and an articulated chute. The double-flap valve is used for directly receiving materials on a quantitative feeder or a belt conveyor. The upper end of the articulated chute is connected to the bottom end of the double-flapvalve, the lower end of the articulated chute is connected with a charge door of a bottom blowing furnace in a sealed manner, and then the materials sequentially pass through the double-flap valve andthe articulated chute to enter the charge door. By means of the bottom blowing furnace charge door sealed charging device, dust escape can be reduced, the materials are prevented from being bound onthe charge door, the cleaning workload of the charge door is reduced, and the labor environment is improved.