Abstract: Objective To understand the status of the coverage of HIV/AIDS prevention services in young men who have sex with men （YMSM） and analyze factors influencing channels of prevention and treatment information access. Method YMSM aged 15 to 24 years in Mianyang City， Sichuan Province were recruited by the snowball sampling method. Prevention services， information access channels， and sexual behavior were investigated and serological tests were conducted among the selected subjects. Data were analyzed using the chi?square test or multivariate logistic regression model. Results A total of 362 YMSMs were surveyed， with a median age of 21.0 years. Of the respondents， 224 （61.9%） had the educational level of college degree or above and 213 （58.8%） were students. The coverage of prevention services was 78.6% （278/362）. The main channels of obtaining information were the internet， accounting for 62.4% of the participants （226/362）， followed by friends （46.6%； 168/362）， television （41.4%； 150/362）， publicity materials （40.6%； 147/362）， and schools （34.0%； 123/362）. The HIV antibody positive rate in those who took the television and publicity materials as the information dissemination channels was lower than those who did not （all P＜0.05）. Multivariate logistic regression showed that， YMSMs who had a college degree or above （OR＝1.814）， were students （OR＝1.880）， had HIV tested （OR＝1.807） or searched for sexual partners through the internet （OR＝2.328） were more likely to take the internet as the main information channel， but those who had depressive symptoms were less likely （OR＝0.579）； those who accepted peer education （OR＝3.391）， had fixed sexual behavior （OR＝3.269） or occasional sexual behavior （OR＝2.756） were more likely to take friends as the main information channel， while those who had more than 2 anal sexual partners （OR＝0.475） were less likely； those who insisted on using condoms （OR＝0.280）， had occasional sexual partners （OR＝0.301） or were positive for HIV?antibody （OR＝0.142） were less likely to take the television as the main information channel； the persons accepting peer education （OR＝5.022） were more likely to take publicity materials as the main information channel， while those with anxiety symptoms （OR＝0.151） and positive HIV antibody （OR＝0.177） were less likely. Conclusion The coverage of AIDS prevention services for YMSM was not high. The internet played an obvious role in information dissemination. The disseminations of television and publicity materials were more prompt and efficient in communication.