Long-term care insurance funds have been mandated by the German Prevention Act to support long-term care facilities in the implementation of health-promoting structures. One area of action is the promotion of the nursing home residents' psychosocial health. The objective of this systematic review was to describe and analyze interventions and intervention components related to the psychosocial health of nursing home residents.First, we conducted a search for systematic reviews and meta-analyses in Medline via PubMed, the Cochrane Library, CINAHL, Gerolit, Embase, Psyndex, and Livivo, and hand-searched additional sources. Second, references of all relevant randomized controlled trials (n=86) were extracted from the identified systematic reviews (n=27). The original articles of the included primary studies were then analyzed using criteria for the evaluation of complex interventions. The GRADE approach was used to assess the quality of the evidence.Seventeen interventions for promoting the psychosocial health of nursing home residents were identified. The majority of the study participants were nursing home residents with dementia. Since the underlying evidence was predominantly very low, it was not possible to draw clear conclusions concerning the efficacy of the interventions for psychosocial health outcomes. The best indications of positive effects were found for reminiscence, mealtime interventions, music therapy, and special care staff training.The diversity and heterogeneity of the interventions made both classification and consistent judgments of the quality of the evidence difficult. From the perspective of promoting the psychosocial health of nursing home residents, the identified interventions should only be considered as suggestions or proposals for prevention and health promotion measures, and future studies should evaluate their implementation.