This study aims to examine the sequential mediating effects of perfectionistic self-presentation and self-silencing in the relationship between rejection sensitivity and binge eating behavior among university students, and to explore the moderated mediation effect of gender within this process. A total of 400 Korean university students in their twenties(200 males, 200 females) participated in a self-report online survey conducted via a survey platform. The measures included the Rejection Sensitivity Questionnaire (RSQ), the Korean version of the Perfectionistic Self-Presentation Scale(PSPS-K), Silencing The Self Scale(STSS), and Bulimia Test Revised(BULIT-R). Summarizing the results, First, perfectionistic self-presentation and self-silencing sequentially mediated the relationship between rejection sensitivity and binge eating behavior. Second, when perfectionistic self-presentation and self-silencing sequentially mediated the relationship between rejection sensitivity and binge eating behavior, gender was found to moderate the relationship between rejection sensitivity and perfectionistic self-presentation. These findings suggest that individuals with high rejection sensitivity tend to present a flawless image to others and suppress their own emotions and needs, especially when they perceive these expressions could damage their relationships. This pattern appears to be more prominent among women. Implications, limitations, and future research directions are discussed.