The childhood experiences of being overprotected and overcontrolled by family members have been suggested to be potentially traumatic. However, the possible associated factors of these experiences among young people are still not well studied. This study aimed to investigate the possible associated factors of childhood overprotection/overcontrol (OP/OC) experiences in young populations in a relatively large, nationwide sample of Chinese university students. A total of 5,823 university students across nine different provinces in China were recruited and included in the data analyses. All participants completed the OP/OC subscale in a recently developed 33-item Childhood Trauma Questionnaire (CTQ-33) to assess their OP/OC experiences. Data were also collected on socio-demographic information and multiple psychological characteristics of all participants. Binary logistic regression was conducted to investigate the associated factors of OP/OC. The prevalence of childhood OP/OC was estimated as 15.63% (910/5,823) based on a cutoff of OP/OC subscale score ≥ 13. Binary logistic regression suggested that being male, being a single child, having depression, having psychotic-like experiences, lower family functioning, and lower psychological resilience were independently associated with childhood OP/OC experiences (all corrected-p<0.05). The OP/OC was also positively associated with all the other trauma subtypes (abuses and neglects) in the CTQ-33. Post-hoc analyses suggested that OP/OC experiences were associated with depression in only females, and associated with anxiety in only males. Our results may provide initial evidence that childhood OP/OC experiences would have negative effects on young people's mental health which merits further investigations, especially in clinical populations.