Hollow-square-shaped sleeping pillow

The hollow type sleeping pillow shaped like the Chinese character'hui 'comprises a pillow body and a pillow case, the pillow body is filled with high-elasticity pearl wool, and a supporting net is sewn in the middle of the periphery of the inner wall of the pillow case. According to the utility model, the hollow design is adopted, i.e., the pillow body and the pillowcase are designed in a concentric-square shape, and the support net is arranged on the inner wall of the pillowcase; therefore, the user can effectively adapt to the physiological curve of the human body, the effect of effectivelysupporting the cervical vertebra is achieved, meanwhile, the head of the user can keep good breathability and heat dissipation performance, the head of the user is fully relaxed, and the comfort of the user during pillow leaning is improved. Meanwhile, the high-density anion balls arranged on the transparent gauze can effectively release high-concentration air anions, so that surrounding air is fresher, and the purpose of