Objective:To understand the relationship of personality characteristics,self-esteem and social sup-port between men who have sex with men (MSM).Methods:Totally 402 cases aged 18-77 years were selected by snowball sampling method in Mianyang City and evaluated with the Chinese version of Eysenck Personality Ques-tionnaire short form scale (EPQ-RSC),Self-Esteem Scale (SES)and Social Support Rating Scale (SSRS).Re-sults:Objective support score was negatively correlated with psychoticism and neuroticism score (standard β=-0.18,-0.28),and positively correlated with introversion-extroversion score (standard β=0.14).Subjective sup-port score was negatively correlated with introversion-extroversion score (standard β=-0.15),and positively cor-related with lie score (standard β=0.22).The utilization degree of social support score was negatively correlated with psychoticism and neuroticism score (standard β=0.16,0.15),and positively correlated with lie score (stand-ard β=-0.15).Self-esteem score was negatively correlated with psychoticism and neuroticism score (standard β=0.10,0.21),and positively correlated with the utilization degree of social support score (standard β=-0.26). Conclusion:The relationships of personality,self-esteem and social support in MSM may be close.