In order to raise stability and high effectiveness of pump and sluice gate engineering, the project on a pump and sluice gate works was carried out by an analysis of numerical simulation, and the structure near the sluice gate was optimized depending on the design parameters as a control condition and using Fluent software by computational fluid dynamics methods. Combining the river transflux features, effective transflux area rate and transflux uniformity were set up, which were two formula expressing flow patterns. Using two formulas as the objective of a numerical simulation and optimization function, the pump and sluice gate structure was optimized. The water current and flow field distribution at drawing and drainage conditions were analyed, and the water flow circumstance and transflux near the gate as well as the effect of “S” turn at the inland river side on the water current were investi gated. The results show that the maximum velocity modified of the inner and outer river area is less than 0.6～0.8 m／s, and the effective transflux area rate and transflux uniformity are greater than 0.75.
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