To investigate the effectiveness of a 10-min self-compassion writing in alleviating body dissatisfaction, self-objectification, and emotional eating in young adult women engaged in emotional eating in the context of appearance-related cyberbullying. A total of 175 Chinese young adult women (Mage = 20.90, SD = 1.65) were randomly assigned to one of the three groups: self-compassion, distraction, or control group. At baseline, participants completed assessments of trait and state body dissatisfaction, trait self-objectification, trait self-compassion, emotional eating, and positive and negative affect. Then they needed to recall an appearance-related cyberbullying victimization experience, after which state body dissatisfaction, state self-objectification, and positive and negative affect were measured. After the intervention, participants completed measures of state body dissatisfaction, state self-objectification, positive and negative affect, state self-compassion, and a food-choosing task. At 1-month follow-up, participants completed measures of trait body dissatisfaction, trait self-objectification, trait self-compassion, and emotional eating. At post-intervention, state body dissatisfaction and negative affect were significantly lower, and positive affect was significantly higher in both the self-compassion and distraction groups compared to control. State self-objectification was significantly lower in the self-compassion group than in the other two groups. At 1-month follow-up, the self-compassion group showed significantly lower levels of body dissatisfaction than the control group. The findings provide initial evidence for the potential of self-compassion writing in reducing state self-objectification and state body dissatisfaction in the context of appearance-related cyberbullying. Appearance-related cyberbullying, a common phenomenon in social networking sites, has been documented to associate with appearance-related concerns and disordered eating in young adult women. However, effective interventions that can reduce these negative associations are scarce. This study preliminarily found that a brief self-compassion writing could be a potential intervention for reducing state self-objectification and state body dissatisfaction in young adult women who had suffered appearance-related cyberbullying.