This systematic review and meta-analysis examined the effectiveness of parent-infant interventions for parents of preterm infants on parental sensitivity compared to standard care or active comparators. This review follows the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines and was prospectively registered in the International Prospective Register of Systematic Reviews (PROSPERO; registration ID: CRD42016047083). Database searches were performed from inception to 2020 to identify eligible randomized controlled trials. Two review authors independently selected studies, extracted data, and assessed the risk of bias using the Cochrane risk of bias assessment tool and quality of evidence using the Grades of Recommendation, Assessment, Development and Evaluation (GRADE) guidelines. A total of 19 studies (n = 2,111 participants) were included and 14 were suitable to be pooled in our primary outcome meta-analysis. Results show no significant effect of parent-infant interventions over standard care or basic educational programs, on parental sensitivity. Results may not necessarily be due to the ineffectiveness of the interventions but rather due to implementation failure or high risk of bias of included studies.