Low normal sperm rate is related to many factors such as physiology, pathology, environment, etc. Generally, a normal sperm rate of more than 4% is considered normal. 1. Physiological factors: poor physical health and mental stress; long-term bad habits such as smoking and drinking; or congenital factors that may cause testicular development to be impeded. 2. Pathological factors: men’s genitourinary tract is infected by germs; varicocele; chronic prostatitis and so on. 3. Environmental factors: ray long time irradiation genital area caused by sperm mutation; hormone or chemical drugs to interfere with sperm maturation, so that sperm development is incomplete; local temperature is too high, resulting in sperm deformity and so on. It is recommended that the patient go to a specialized hospital for examination and active treatment after clarifying the cause.