Sexual function in men at age 50 varies from person to person, and there will be an overall decline. If a man is in a healthy state of physical fitness at the age of 50, lives a regular life and does not have various chronic diseases, he can also maintain good sexual function. With age, men’s penis will become smaller, and testicular and endocrine function will be seriously reduced, then men will have low libido, erection hardness deterioration, morning erection or night erection weakened or even disappeared, impotence, premature ejaculation can occur. But for a normal sex life, it can be basically maintained, but the time and quality of sex life will be significantly reduced, and the sexual organs will gradually appear aging symptoms with age. In addition, sexual function is closely related to various chronic diseases and daily habits, such as hypertension, hyperlipidemia, diabetes, smoking, alcohol consumption, obesity and so on. Therefore, 50-year-old men in their daily lives need to develop the habit of exercise, strengthen the nutritional intake, not only physical and mental health and prevention of sexual function premature aging. If a man is 50 years old and suffers from sexual dysfunction, he should seek medical attention as soon as possible to avoid adverse consequences.