The invention discloses wet sand-throwing descaling equipment, and belongs to the technical field of plate strip surface descaling equipment. The wet sand-throwing descaling equipment at least comprises a descaling unit. Each descaling unit comprises a descaling box, a mortar feed mechanism and a circulating filter system. Each mortar feed mechanism is communicated with each wet impeller head on the corresponding descaling box and supplies a descaling medium to the corresponding descaling box. Mortar formed by mixing water and steel grit particles serves as the descaling medium. The mortar formed by mixing the water and the steel grit particles serves as the descaling medium, no harmful substance is generated in the descaling process, and the descaling process is free of pollution, environment-friendly and friendly in work environment; and the product quality is greatly improved, and the product defects such as overpickling, underpickling and hydrogen embrittlement happening to existing pickling products are overcome. Meanwhile, the equipment is compact in structure and efficient in descaling, and the quality is continuously controllable.