Objective:To explore the multi-mediating effects of intentionality self-regulation and optimism in social support for left-behind children’s hope.Methods:A total of 912 left-behind children from grade 7 to 9 were measured by the Social Support Scale,the Children’s Hope Scale,the Intentionality Self-regulation Scale and the Optimistic Scale.Results:Gender difference was statistical significance in intentionality self-regulation(t=-2.055,P