The invention discloses a dry powder slurrying and charging system. The dry powder slurrying and charging system comprises a dry powder charging device and a slurrying device, wherein the slurrying device is provided with a dry powder inlet, a stock solution inlet and a slurry material inlet, the dry powder inlet is connected with the dry powder charging device, the stock solution inlet is formedin the side wall of the slurrying device, and a material guiding piece is arranged in the stock solution inlet; the material guiding piece enables an inlet route of stock solution to be not intersected with the central axis of the slurrying device, the stock solution inlet is communicated with a stock solution storage tank by virtue of a stock solution conveying pipeline, and the slurry material outlet is communicated with a reaction tank. The dry powder slurrying and charging system disclosed by the invention is applicable to multiple dry powder charging conditions, flexible to use and wide in application range, and dry powder slurrying effect and utilization rate can be improved, an operating environment also can be improved and energy consumption also can be reduced by adopting the drypowder slurrying and charging system.