Background: Approximately 4.1% of Danish children experience child abuse (CA) and clinical experience suggests that the number of cases of physical abuse of children are on the rise during the COVID-19 lockdown. In Denmark, the Nordic Barnahus model is implemented to support cross-sectional collaboration in cases of suspected child abuse and the Danish National Centre for Psychotraumatology (NCP) has supported the development and implementation of the Danish version of the Nordic Barnahus model (DCC) since 2013. Aim: To describe and discuss the collaboration between a national multidisciplinary clinical practice, the DCCs, and research at the NCP to simultaneously qualify research and practice in child psychotraumatology. Development and method description: The DCCs and the NCP originally collaborated to develop a valid assessment battery to support the DCC’s task of screening for trauma-related symptoms and -disorders following exposure to physical or sexual CA. This formed the basis for a continued collaboration including the foundation of a database on psychological outcomes following child abuse as well as initiatives in education and supervision. Results: Currently, data has been collected for 2000+ children and provides opportunities for validating updated developmentally sensitive measures and examining characteristics of children exposed to CA from a national sample. Conclusion and perspectives: The collaboration and integration of research into clinical practice improves both fields. The DCC work with updated evidence-based assessment of vulnerable children, and the NCP gains access to a unique and large cohort of children to generate knowledge on physical, sexual, and psychological CA.