Despite high shame about mental health symptoms among UK social work students, positive psychological approaches to their mental health have not been investigated in depth. Emotional resilience has been a core skill in social work practice; however, its relationship with mental health is still unclear. Therefore, the primary purposes of this cross-sectional study were to (i) examine the relationships between mental health and positive psychological constructs, namely resilience, self-compassion, motivation and engagement and (ii) determine predictors of mental health in UK social work students. An opportunity sampling of 116 UK social work students (102 females, 14 males; 96 undergraduates, 20 postgraduates) completed 5 measures about these constructs. Correlation and regression analyses were conducted. Mental health was associated with resilience, self-compassion and engagement. Self-compassion was a negative predictor, and intrinsic motivation was a positive predictor of mental health symptoms. Resilience did not predict mental health symptoms. The findings highlight the importance of self-compassion to the challenging mental health of UK social work students; they caution against the overuse and misunderstanding of resilience in the social work field.