The main means of controlling the spread of AIDS is to control the source of infection and cut off the transmission route. The way to control the source of infection is to detect HIV infected people in time and actively treat them with antiviral therapy to reduce the possibility of transmission to others. The first way to spread AIDS is through blood. Sharing syringes and needles with AIDS patients may lead to transmission, so it is important to avoid this situation as much as possible. Another way of transmission through blood is through blood donation, so people with AIDS should not donate blood. At present, when donating blood for free, we have to check for AIDS antibodies. If we judge that the blood is not qualified for AIDS patients, it will be discarded and transmission through blood can be avoided. Another way is through sexual transmission. If you have sex with strangers, you must take safety measures throughout the whole process, that is, wear condoms throughout the process, which can largely reduce the transmission of AIDS through sexual transmission. AIDS can be transmitted from mother to child. By giving blocking medication to the mother, the majority of newborns can be prevented from being infected, and breastfeeding should be avoided after birth.