A new way of virtual prototype design and analysis for tractor steering system was discussed, by which the function of experimental design and optimization design for the tractor steering system was achieved with three dimensional modeling software, kinematics and dynamics analysis software, finite element analysis software and their secondary development techniques. A non-sideslip analysis system based on VC++ platform for tractor steering system was developed, and the interface between softwares and key development procedures were introduced by using Pro/E, ANSYS and ADAMS softawre analysis techniques and their secondary development techniques. Considering the factors of steering trapezoid rod and the trapezoid basic angle of steering trapezoid mechnism, the relative conclusions were got by the running instance. The experiment results showed that simulation analysis could be achieved without any abundance manual operation and the design analysis efficiency could be improved, which would provided the theoretical base for actual design analysis of tractor.

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