At present, the use of condoms is an effective measure to stop the spread of AIDS during sex, but the premise is that condoms must be applied in a standardized way, throughout the whole process, without falling off, and the quality of condoms must be guaranteed. In China, HIV infection through sexual intercourse is the main transmission route, and HIV infection through sexual intercourse accounts for more than 90% of the total number of infected people, mainly adults between the ages of 15 and 49, because this is the time of sexually active life, with multiple sexual partners or men who have sex with men, is the high incidence of HIV. Under unprotected conditions, the probability of infection is about 1% for a single sexual encounter with a heterosexual person with AIDS, and significantly higher for a man who has sex with a man.