Background:　Cyberbullying　victimization　during　adolescence　may　induce　an　increased　risk　for　non-suicidal　self-injury　(NSSI).　However,　the　longitudinal　mediating　mechanism　underlying　the　association　of　cyberbullying　victimization　with　adolescents＇　NSSI　over　time　has　not　been　studied　fully.　Objective:　The　current　study　aimed　to　examine　the　longitudinal　mediating　mechanism　underlying　relationship　between　cyberbullying　victimization　and　NSSI.　Based　on　Nock＇s　(2009)　integrated　developmental　model　of　NSSI,　this　study　explored　the　mediating　effects　of　psychological　distress　and　maladaptive　beliefs　following　cyberbullying　victimization　in　this　relationship.　Participants　and　setting:　A　total　of　773　Chinese　adolescents　(48.4　%　males,　T3　mean　age　=　16.37　+/-　0.49　years)　participated　in　this　study　and　completed　self-report　questionnaires.　Methods:　We　employed　a　three-wave　(called　T1,　T2,　and　T3)　longitudinal　design.　The　participants　completed　all　of　the　questionnaires　at　T1,　completed　questionnaires　on　psychological　distress　and　maladaptive　beliefs　at　T2,　and　completed　the　NSSI　list　at　T3.　Correlation　analysis,　structural　equation　modeling　(SEM),　and　a　bootstrap　procedure　were　used　to　test　our　expectations.　Results:　Correlation　analysis　indicated　that　cyberbullying　victimization,　maladaptive　beliefs,　psychological　distress,　and　NSSI　were　significantly　and　positively　correlated　with　each　other.　The　results　of　mediation　analysis　revealed　that　early　cyberbullying　victimization　(T1)　had　a　direct　association　with　adolescents＇　subsequent　NSSI　(T3),　and　early　cyberbullying　victimization　(T1)　indirectly　predicted　adolescents＇　subsequent　NSSI　(T3)　via　the　parallel　and　sequential　mediating　effects　of　maladaptive　beliefs　(T2)　and　psychological　distress　(T2).　Conclusions:　Victims　of　cyberbullying　are　often　prone　to　engaging　in　NSSI.　Interventions　that　target　students　with　NSSI　should　focus　on　intervening　in　their　maladaptive　beliefs　and　psychological　distress　following　cyberbullying　victimization.