Abstract: The construction of a legal liability system for water-related offenses is essential to prevent water risks and ensure water stability in the Yangtze River Basin.The smooth integration between water administrative law enforcement and criminal justice profoundly impacts the effectiveness of governance in the basin.The enactment of the Yangtze River Protection Law provides an institutional framework for the combination of water administration and criminal law.Empirical study of law enforcement found that the new and old legal liability is not coordinated, collecting and transforming evidence is problematic, information sharing on water cases is weak, inter-departmental and cross-regional collaboration is unsustainable, and access to supervision clues is limited, which are undermining the integration.To ensure the integration mechanism can facilitate the governance in the Yangtze River Basin, it is necessary to refine the law enforcement regulations, build an efficient and reasonable evidence collection and transformation mechanism, promote the construction of an information sharing platform with a smart law enforcement model, enhance the binding nature of basin cooperation agreements, expand the access of prosecutorial supervision.Finally, the integration mechanism between water administrative law enforcement and criminal justice can be fulfilled.