The invention provides a shell-pulp separator. The shell-pulp separator comprises a rack, a spiral material disc, a vibrating device, a material recovering disc, a cover cap and a draught fan, wherein the spiral material disc is elastically mounted and connected with the rack through springs or resin, and takes the shape of a disc; the bottom surface of the spiral material disc is an upward convex conical surface; a feeding rail which spirals from the bottom surface of the spiral material disc is arranged on the edge of the bottom surface; the vibrating device is rigidly mounted at the bottom of the spiral material disc; the material recovering disc is ring-shaped and mounted on the outer wall of the bottom of the spiral material disc; the cover cap covers the top of the spiral material disc; the top end of the feeding rail is exposed to the outside of the cover cap; the draught fan is mounted between the cover cap and the spiral material disc; the air outlet direction of the draught fan is downward vertically; and the draught fan is electrically connected with the vibrating device. By adoption of the shell-pulp separator provided by the invention, the pulp and the shell of nut food can be automatically separated.