Abstract:With the expansion of engineering construction scale and the complexity of service environment, traditional concrete dams are prone to problems such as cracks, leakage, and deformation, which seriously affect the service life of the project. The prestressed concrete technology can effectively improve the crack resistance and durability of dams by applying stress in advance to offset the load stress during service life. In view of this, the article starts from the basic concept of prestressed concrete technology, introduces the role of prestressed concrete technology in water conservancy dam engineering, analyzes the specific application of prestressed concrete technology in water conservancy dam engineering, and verifies the application effect with engineering examples, in order to provide reference for engineering practice in related fields.