BACKGROUND: Cyberbullying has become an essential public health psychological issue affecting people’s lives in the online ecology. However, previous studies have rarely examined adolescent paranoia, moral cognition, and cyberbullying in association. Therefore, this study was based on cognitive-behavioral theory to investigate the relationship between child-like paranoid tendencies, cyberbullying, and moral disengagement. METHODS: This study used the Paranoia Scale, Cyberbullying Scale, and Moral Disengagement Scale to conduct an anonymous online survey of 1519 adolescents in China. RESULTS: (1) Paranoid tendencies, moral disengagement, and cyberbullying were all significantly and positively correlated. Boys showed higher rates of moral dis...