To describe the trends of the HIV epidemic among men who have sex with men in Chengdu city, consecutive cross-sectional surveys were conducted by Chengdu Center for Disease Control and Prevention. These surveys were carried out in the period from 2009 to 2014 according to the protocol of the national HIV Sentinel Surveillance System. For the 2422 men who have sex with men who participated in the survey, the overall HIV prevalence was 15.5% (375/2422, 95% CI 14.0–16.9%). Between the years 2009 and 2014, the HIV prevalence of MSM has been maintained at a high level, with the HIV antibody positive rate were 15.0%, 15.1%, 16.3%, 13.9%, 17.8% and 14.0%, respectively (² for trend = 0.008, P = 0.931). However, the majority (89.8%) of participants had had anal sex in the six months prior to the interview, and the percentage always using condoms during anal sex increased over the study period (36.7% in 2009, 39.8% in 2010, 36.9% in 2011, 46.2% in 2012, 65.1% in 2013, 49.0% in 2014, Chi-square for trend = 49.883, P < 0.001). HIV prevalence among men who have sex with men in Chengdu city has remained at a rather high level. Given the continuing high levels of unprotected anal intercourse and high HIV prevalence among men who have sex with men, more effective intervention strategies are required to increase the coverage of men who have sex with men by high-quality behaviours intervention and to promote HIV testing among this population.