1, do not stay up late: staying up late can lead to spermatogenic dysfunction, poor sperm vitality, increased malformation rate and DNA fragmentation rate; 2, quit smoking, alcohol: smoking can cause a decrease in the number of sperm and produce oxidative stress damage. Long-term alcohol abuse sperm fertilization capacity decreased, low libido, sexual dysfunction; 3, avoid sedentary, long time driving, exposure to high temperature (such as sauna, welding, boiler work and wearing tight underwear); 4, avoid exposure to toxic and harmful substances (such as paint, formaldehyde, pesticides, lead, mercury, septum, boron, etc.), radiation, etc.; 5, enhance physical fitness, balanced nutrition; 6, regular sex: do not be too frequent or too little (generally 1-2 times a week or so).