Evidence for the prospective associations among parental failure mindset, helicopter parenting, and children’s intelligence mindset is lacking. This three-wave longitudinal study (12 months apart between waves) addressed this research gap by testing whether perceived maternal helicopter parenting mediated the link between perceived maternal failure mindset and intelligence mindset. Participants included 525 Chinese adolescents (47.2% girls, Mage = 15.41 years, SD = 0.22). Random-intercept cross-lagged analysis suggests that mothers with stronger failure-is-debilitating mindsets are more likely to engage in helicopter parenting, which may in turn contribute to stronger endorsements of a fixed mindset of intelligence in their adolescent children. The relation between maternal helicopter parenting and children’s intelligence mindset appeared to be reciprocal, i.e., children’s fixed mindset may elicit more helicopter parenting over time.