In the paper,Shanxi Yumenkou Irrigation Area Stage II Canal Aqueduct Reinforcement and Transformation Project is adopted as an example. Corresponding repair and reinforcement technical plan is proposed on the basis of testing evaluation aiming at aging and disease problems thereof such as concrete freeze-thaw erosion,serious carbonation,steel bar rust,crack,etc. Water penetration operation observation is implemented after project repair. Related defects are effectively handled. Seepage problem is completely...