The utility model relates to related equipment for producing sodium carboxymethyl cellulose. The utility model relates to a washing device, in particular to a washing device for sodium carboxymethyl cellulose production. The device comprises a premixing box and a washing box positioned below the premixing box, the premixing box comprises a premixing cavity and a discharging baffle arranged on thelower portion of the premixing cavity. The washing box comprises a first washing section and a second washing section located below the first washing section, the first washing section is provided with a spray gun and a screen located below the spray gun, a stirrer is arranged at the bottom of the second washing section, and a discharging port is formed in the side wall of the second washing section. Compared with the prior art, the utility model has the advantages that: firstly, materials are rinsed and pretreated, then the materials are crushed and flushed more thoroughly by using the high-pressure flushing machine, the crushing effect of the materials is ensured through the screen, and the crushed materials are washed more thoroughly in the second cleaning section, so that the washing effect is ensured.