Abstract：This paper takes the water leakage problem of the metal roof of a sports venue as the research object, and conducts research on the analysis of the causes of water leakage, the formulation of repair plans, and the study of preventive measures in combination with the practice of engineering quality forensic identification. The research conclusions show that the water leakage of the metal roof of the venue is the result of the synergistic effect of design defects and construction quality issues, and the risk of water leakage in similar projects can be reduced by taking certain measures. In addition, through sorting out the standardized forensic identification process and applying on-site investigation and data analysis methods, this paper provides a reference for the quality forensic identification of similar cases, helping to improve the professionalism, accuracy and efficiency of engineering quality forensic identification.