Buckwheat pillow based on ergonomic design

The buckwheat pillow based on the ergonomic design comprises a pillowcase and a pillow inner, a cylindrical sleeve is arranged on any one of the front side face and the rear side face of the pillowcase, and the pillow inner comprises a plurality of independent buckwheat layers and down feather layers which are sequentially arranged from top to bottom. The buckwheat layers and the down feather layers are fixedly connected through buckles which are arranged at the four corners and used in a matched mode, a long-strip-shaped zipper is arranged in the middle of the bottom face of the pillowcase, any down feather layer can be rolled into a cylinder matched with the inner wall of the cylindrical sleeve from one end to the other end in the length direction of the down feather layer, and any side face of the cylindrical sleeve is further provided with an annular zipper. And an arc-shaped surface matched with the cylinder is arranged on any end surface of the buckwheat layer and the down feather layer in the height di