It is a new way and method to design passageways of pumping stations by flow field numerical computation in order to optimize their hydraulic designs. Based on flow field computation method, their realized methods were studied according to engineering requirements, including processing all kinds of functional curves, visualization of axial velocity for outlet section and other sections as well as reprocessing and display of 3D computation grids. Using ARX of AutoCAD, all kinds of visualization functions above can be realized.