The invention relates to a system and technology used for wet ash processing, and provides a wet ash kiln feeding system and technology used in fly ash water washing. The technology is used for realizing different processing on materials of different water contents, and increasing pulping efficiency. The wet ash kiln feeding system comprises a raw material storage chamber, a material crushing unit, a mixing pulping unit, a metering device, and a slurry conveying unit; two outlets of the raw material storage chamber are connected with an inlet of the material crushing unit and an inlet of the mixing pulping unit; an outlet of the material crushing unit is connected with an inlet of the mixing pulping unit; an outlet of the mixing pulping unit is connected with an inlet of the slurry conveying unit; and an outlet of the slurry conveying unit is connected with an inlet of a cement kiln.