Objective: This study examined the effects of peer support and self-affirmation on the regulation
of negative emotions among college students in a Grid Management environment. The aim was to analyze
whether self-affirmation training could alleviate individual negative emotions and be applied in school
mental health group counseling and individual counseling. Methods: In a randomized controlled trial,
223 college students were randomly assigned to the control group, the self-affirmation group, and the
self-affirmation group with peer support. Anxiety self-rating scale and depression self-rating scale were
assessed before (March 21) and after (April 6) the subjects' intervention, and the results were analyzed
using a mixed design ANOVA. Results: (1) The self-affirmation group and the self-affirmation group with
peer support showed lower levels of depression than the control group after the one-week intervention
(η2=0.254, p<0.01); (2) The self-affirmation group with peer support had lower levels of depression on
the posttest compared to the peer support only group (η2=0.254, p<0.01); (3) the improvement in anxiety
levels between self-affirmation and peer support was not significant (η2=0.015, p=0.079). Conclusion: This
allows for peer-supported self-affirmation intervention training to slow down college students' depression
levels and improve their emotional state in short-term stressful situations.