In recent years, with the development of the Internet, the originally marginalized sexual minorities have appeared more and more frequently in the public field of vision, but due to the existence of proximal pressure and distal pressure, the psychological problems of sexual minorities still cannot be ignored. In order to better understand the living situation and mental health level of sexual minorities, reduce public opinion and disputes caused by gender knowledge errors, through literature collection, case interview, questionnaire survey, spss statistical analysis and other research methods, we integrated the definition, status and type of sexual minorities, stressors, social support status, mental health status and influence. The results show that the stressors faced by sexual minorities can reduce their perception of social support and thus reduce their mental health level. Therefore, increasing social support for sexual minorities can improve their mental health level. Finally, through the form of innovative programs to let more people pay attention to and understand this marginalized group, and strive to eliminate the public's cognitive bias towards sexual minorities.