The invention relates to a screening and crushing device, in particular to the screening and crushing device for rare earth carbonate. The invention aims to achieve the technical effect of providing the screening and crushing device for the rare earth carbonate. The achieve the above technical effect, the invention provides such a screening and crushing device for the rare earth carbonate, the screening and crushing device comprises a barrel body, a lifting device, a smashing device, a screening net, a ring plate, a material adding hopper, support legs and the like, the upper portion of the barrel body is provided with the smashing device, the barrel body is internally provided with the screening net and the ring plate, the inner side walls of the screening net and the ring plate are connected through bolts, the top of the barrel body is provided with the material adding hopper in a welded manner, the material adding hopper communicates with the barrel body, the top of the material adding hopper is connected with the smashing device, and the bottom of the barrel body is provided with the plurality of support legs in a welded manner. The screening and crushing device for the rare earth carbonate provided by the invention is simple in structure, easy to maintain and repair and low in maintenance and repairing cost, the cost expenditure of enterprises is reduced, and the burden ofthe enterprises is lightened.