1, avoid malnutrition and overnutrition: both malnutrition and overnutrition can affect male fertility. 2, prohibit the consumption of food that affects fertility: cotton phenol in cotton oil damages the spermatogenic function of testes; food additives, coloring agents, preservatives, etc. affect the spermatogenic function of testes; agricultural by-products with a large number of pesticide residues seriously endanger human health and damage the spermatogenic function of testes; hormone regulating pollutants and containing estrogen analogues affect sexual and reproductive functions, such as pesticides, plastic packaging, etc. 3, avoid exposure to substances that damage reproductive function: car exhaust, paint, cigarette smoke, paint, gas, etc. and heavy metals such as lead and cadmium. 4, quit smoking and drinking habits: tobacco has more than 1200 kinds of harmful substances, of which nicotine is the most harmful, alcohol is also very damaging to the spermatogenic function of the testicles, is the killer of male fertility. 5, to prevent testicular trauma: testicular trauma can lead to serious immune damage. 6, avoid ionizing radiation and non-ionizing radiation: testicular tissue is very sensitive to ionizing radiation, such as: X-ray irradiation, marble and other materials; electromagnetic waves, microwaves, ultraviolet light, etc.; tight underwear, hot baths, saunas, high-temperature work, etc.