Objective To understand the human immunodeficiency virus（HIV） infection and itsinfluencing factors among men who have sex with men（MSM） in Anshan City， provide the basis for the formulation of targeted prevention and control strategies. Methods The AIDS sentinel monitoring data of MSM in Anshan City from 2016-2019 were analyzed. Results Among 1 600 respondents，the positive rate of HIV antibody was 9.44%， showing a downward trend year by year（χ²_trend=7.789， P<0.01）， and the positive rate of syphilis was 6.25%， showing a downward trend year by year（χ²_trend=85.280， P<0.01）. The awareness rate of AIDS knowledge was 92.69%. In the last six months， 94.63% of them had homosexual anal sex. The rate of condom use in the last homosexual anal sex was 84.08%， and the persistent condom use rate in homosexual anal sex in the last six months was 65.52%. In the past year，94.63% of them had received AIDS prevention services. MSM with low education level and syphilis had higher risk of HIV infection. MSM who insist on using condom during homosexual anal sex in the last six months had lower risk of HIV infection.Conclusion The HIV infection rate of MSM in Anshan City from 2016-2019 is still at a high level. It is necessary to take targeted publicity and intervention measures for MSM with different characteristics and strengthen STD prevention and control， to further control the spread of HIV.

Men who have sex with men, Human immunodeficiency virus infection, Influencing factors