There are more psychological causes of impotence, psychological factors affecting erection due to the different environment, experience, psychological state and personality characteristics of each person, the psychological response to the same mental and social factors are also different, most people may not cause erectile dysfunction psychological frustration, for some people but may become a causative factor. The etiology of functional impotence is presumed to have the following aspects: 1, the influence suffered during the development process lack of correct sexual knowledge, gullibility to certain legends, strict parental requirements on sexual issues at home, parental emotional disharmony, negative family attitudes towards sexual issues, long-term masturbation in youth, exaggerated awareness of the dangers of masturbation, may cause psychological conflicts. 2, the impact of the relationship between the husband and wife is not coordinated the first time the wedding night failed to have sex, the lack of understanding of the different physiological characteristics of men and women, men and women do not cooperate with each other, mental unhappiness during sexual intercourse, hostile to the woman, do not understand, do not trust, the woman’s lack of attraction to him. 3, emotional reasons Fear of sex and worry about the size of the penis, anxiety, depression, guilt and lack of self-confidence. 4.Other causes Premature ejaculation, excessive physical fatigue, distraction, acute illness, temporary erectile difficulties due to anxiety, medical influence, incorrect interpretation by medical personnel. In conclusion, there are many causes of functional impotence, and it is very difficult to correctly distinguish the mental factors of impotence clinically, but whether it is organic impotence or functional impotence, there are mental factors.