Pp cotton is an artificial chemical fiber. Because of its comfortable feel, good resilience and strong warm-keeping function, it is widely used to fill clothes, dolls and bedding in China. Qualified pp cotton is harmless to human body when making pillows. Pp cotton, that is, polypropylene fiber, has the advantages of softness, comfort, good warmth retention, easy cleaning and drying. It is the most widely used filler for pillow cores in the market. If the pp cotton filled in the production process is unqualified, it will bring certain harm to human body. If the pp cotton filled in the pillow is unqualified, the pillow will be uneven, which will affect the sleep quality and spine. Therefore, when purchasing pp cotton pillows, we should choose formal channels and buy products with quality assurance.