Abstract: This paper reports an investigation on the effect of cross-shaped vortex baffles in rectifying the flows in the forebay and intake pipes at a large-scale pumping station using CFD simulations. Results show that without anti-vortice devices, large-scale circulations and vortices are observed in the forebay, and that zones of high velocity and high vorticity exist around the pump inlets, leading to adverse flow patterns. But dramatic changes occur in flow uniformity in the forebay and at the bell mouth inlets and pump inlets when cross vortex baffles are installed. Three depth-width ratios of 6:8, 6:15 and 6:24 of the baffles are examined and compared, and it is found that the ratio of 6:15 is the best in terms of flow uniformity and high-velocity zone suppressing. This anti-vortice scheme can remarkably reduce vorticity from the typical no-baffle value of 0.508 to 0.101 at the pipe centerplanes and from 0.495 to 0.098 at the bell mouth inlets. Also, it can increase the uniformity of axial velocity by 4.1% at the bell mouth inlets and 3.2% at the pump inlets. Thus, the cross-shaped vortex baffle is a useful device for rectification of the flows in the intake field of the large-scale pump station.