To explore the moderating effect of nature connectedness on cyberbullying victimization and suicidal ideation, 1568 students from 7 universities were randomly selected. A survey was conducted using a general data questionnaire, the Cyber Bullying Behavior Scale, the Beck Suicide Ideation Scale and the Nature Connectedness Scale. The results showed that (1) the report rate of suicidal ideation was 7.21% and there were significant differences according to cyberbullying victimization or no, gender and course; (2) cyberbullying victimization correlated positively with suicidal ideation, and nature connectedness correlated negatively with suicidal ideation; and (3) nature connectedness negatively moderated the relationship between cyberbullying victimization and suicidal ideation. In conclusion, suicidal ideation among college students is closely related to cyberbullying victimization and nature connectedness. Cyberbullying and suicidal ideation in students can be addressed by improving their connection with nature.