Sun Simiao was born in the seventh year of the Western Wei Dynasty (54 1). He claimed that "when he was young, he suffered from the cold, and he repeatedly built a medical clinic, and his wealth was exhausted." When Sun Simiao was a child, he was thirsty for knowledge and had a wide range of knowledge, but later he became ill and often sought medical treatment and spent a lot of money. So he decided to become a doctor.

Sun Simiao attached great importance to the prevention of diseases, emphasized the view of putting prevention first, and adhered to the method of treating diseases based on syndrome differentiation. He thinks that if people are good at taking care of their lives, they can avoid diseases. As long as "a good doctor guides him with a medical stone and saves him with an injection", "there is a treatable disease in his body shape and an incurable disaster in the world." And put forward "never forget death, never forget danger", emphasizing that "it is appropriate to regulate qi, tonify diarrhea, massage and guide every day, and not to take health care as Chang Ran." He advocated paying attention to personal hygiene and sports health care, and put forward the idea of combining dietotherapy, medication, health preservation, nourishing and health care to prevent and treat diseases.