Abstract: This study aimed to explore the effectiveness of mindful self-compassion training (MSCT) on suicidal ideation in rural left-behind children and explore the mediating role of positive psychological capital and social adaptation between trait mindfulness and suicidal ideation, to reveal the potential mechanism of MSCT in suicidal ideation. In this study, 69 rural left-behind children (mean age 13.81 ± 0.77) and 66 non-rural left-behind children (mean age 13.76 ± 0.70) were recruited by the convenience sampling method. Sixty-nine left-...