Objective To investigate the awareness rate of AIDS-related knowledge and prevention measures among homosexual men in Beijing. Methods The Blued platform registered users whose place of registration was Beijing were investigated by anonymous questionnaire. Results Of the 600 sending questionnaires, totally 500 questionnaires were retrieved. A low level of awareness rate of AIDS-related knowledge was identified among respondents, and there was a significant difference in awareness rate between respondents with different age and education level (P<0. 05). Conclusion Findings of the survey showed a low level of awareness of AIDS-related knowledge and prevention among homosexual men in Beijing, and awareness of AIDS-related knowledge was influenced by age and education level of. It is required to strength the efforts on publicity and education of AIDS prevention among homosexual men. (目的 调查北京市男同性恋者艾滋病预防相关知识知晓率现状。方法 采用无记名方式通过Blued平台对地理位置显示北京地区的注册用户发放600份问卷。结果 回收有效问卷500份。调查对象问卷总体得分较低, 不同年龄、学历的受访人员知晓率比较, 差异有统计学意义(P<0. 05)。结论 北京市男同性恋人群艾滋病预防相关知识的知晓率偏低, 年龄和文化程度影响知晓率。应加强对男同性恋预防艾滋病知识的宣传力度。)