Abstract: To explore the current epidemic situation of HIV infection and to analyze high risk factors in HIV high risk population in Liaocheng city. Methods: The serological surveillance data of HIV high risk population, the data of epidemiological survey among people with AIDS/HIV and the data of high risk behavior among female commercial sex workers were analyzed using the descriptive epidemiological analysis methods. Results： A total of 9 539 serum were tested from 2003 to 2005, and 10 HIV positive persons were detected, the HIV positive rate was 0.105%. Among the 10 HIV positive people，3 were paid blood (plasm) donors, 4 had blood transfusion history and 1 was sexual transmitted from spouse, and 2 had the history of sex with someone else, other than his/her spouse. The rate of condom use was relatively lower among female sex workers. exists in 3 kinds of people who are paid blood donors, receptors of blood transfusion and female sex workers, and the main mode of HIV infection is through blood in the past, but the sexual transmitted mode is becoming more and more impotent at present; the rate of condom use is very low among female commercial sex workers. It is necessary to conduct AIDS/HIV health education and high risk behavior intervention; enhancing the rate of condom use among female sex workers and preventing further HIV transmission from high risk population to ordinary people. Conclusions: The AIDS/ HIV infection mainly

Key words: High risk population, AIDS/HIV infection, Surveillance