Objective To explore the relationship between college students' mental health, personality and perceived social support. Methods With Perceived Social Support Scale, NEO Five Factor Inventory and General Health Questionnaire-GHQ20, 1800 college students from 9 Hunan colleges and universities were inverstigated. Results (1)Significant positive correlation exist between the factors of GHQ-20. and NEO-N, while significant negative correlation exist between the factors of GHQ-20 and NEO-E, NEO-C and all factors of perceived social support; perce...