The invention discloses a reduction reaction device for powdery materials. The reduction reaction device for the powdery materials comprises a reaction furnace body, a heating device and at least one feeding nozzle; a reaction cavity is defined in the reaction furnace body; a feeding inlet, a discharging outlet, a reduction gas inlet and a reduction tail gas outlet which communicate with the reaction cavity are formed in the reaction furnace body at intervals; the heating device is arranged in the reaction cavity and located between the feeding inlet and the discharging outlet for providing heat for a reduction reaction of the materials; the feeding nozzles are arranged at the feeding inlet, the feeding nozzles inject the materials into the reaction cavity and enable the materials entering the reaction cavity to be dispersed on the cross section of the reaction cavity. According to the reduction reaction device, feeding is smooth, the materials are more uniformly distributed on the cross section of the reduction reaction device, the materials and reduction gas can react rapidly and fully, and the reduction reaction efficiency is improved greatly.