Abstract: A visual design system in tractor axle based on B/S and C/S hybrid mode was developed, and the system function and technical flow of visual design were researched synthetically. The system has the functions of performance parameters design, optimal design of structure parameter, three-dimensional parametric design of parts, virtual assembly and network data query etc. The tractor axle visual design system was tested and confirmed through the concrete example. Practice indicated that the visual design system developed in this project was an effective measure to improve efficiency of engineering practical design.