Abstract: Taking Huazi sluice pumping station as research subject, by referring to the actual engineering project, we designed and constructed a normal hydraulic model with geometric scale of 1:20 according to gravity similarity criterion. The experimental results showed that there was a certain extent of backflow and stagnation at the slope and bottom area in forebay of the pumping station. In order to tackle the flow pattern problems, we put forward a scheme that adjusts slope gradient of the forebay to improve the flow pattern. We adopted numerical simulation method to carry out a preliminary comparison of the adjustment schemes, and chose an optimal one to revise the design. The final experimental results showed that the adjusted scheme eliminated the cross-axis backflow problems in the original scheme, which effectively improved the flow pattern in the forebay.