In recent years, as seen in the clinical practice of urology and infertility departments, the decline in sperm quality has led to an increasing number of patients being seen for male infertility. In addition to genetics and organic lesions of some organs, male infertility is closely related to lifestyle habits. So, what factors can cause male sperm reduction and lead to infertility? One, the indiscreet habits of life. The unchecked habits of life can easily cause male reproductive tract infections. The first thing that affects the sperm production and sperm transport is the reproductive capacity decline caused by spermatozoa. Second, smoking and alcoholism. Men are quite sensitive to the toxins in tobacco and alcohol, especially the germ cells are more vulnerable. According to research, the nicotine in tobacco has the effect of reducing the secretion of sex hormones and killing sperm. Long-term alcohol abuse can cause damage to the spermatogenic cells of the testicles and affect sperm production. Third, the warm environment damage to the testicles. Many men wear tight pants for a long time to show a fit body, so that the heat dissipation function of the scrotal skin does not play, which in turn increases the local temperature of the testicles, hindering sperm production. The testicles are sperm-producing organs, often with very hot water tub, sauna, so that the scrotum is often in a high-temperature state, will affect the sperm function of the testicles. Fourth, improper diet. Nutritional deficiencies, such as vitamin A deficiency, can lead to spermatogenic epithelium does not grow; vitamin B deficiency can affect pituitary function and reduce fertility; vitamin C has an important role in preventing semen coagulation and maintaining sperm vitality; vitamin E deficiency can cause testicular damage; calcium and phosphorus deficiency can reduce fertility; the lack of trace elements zinc and magnesium can also have an impact on sperm production and vitality. Fifth, the damage of drugs. Modern medical research has proved that many drugs can cause male infertility. Such as cyclophosphamide can make testicular sperm dysfunction; methotrexate can cause a reduction in the number of sperm, sperm vitality; cimetidine, etc. through the inhibition of androgen secretion, indirectly reduce sperm vitality. Seven, sexual life is too frequent or improper. Although the testicles can produce tens of millions to hundreds of millions of sperm every day, but after an ejaculation, it takes 5 to 7 days for the sperm to mature and reach a sufficient number. If you have sex too often or in an uncontrolled manner, the amount of sperm emitted each time is low, so it is naturally not easy to conceive. Sperm quality is a major issue for human survival and reproduction. For these factors, on the one hand, we must take a high degree of vigilance, timely attention and avoid; on the other hand, we must also call on all the forces of society to improve our living environment. Otherwise, it will be like the American scholar Theo Kolbourn’s “We are being destroyed” in his book “We are being destroyed”. Colburn in the book “our stolen future” said: infertility may become a widespread epidemic, the future of men may lose their fertility completely ……