The combined jib of a crane is a complex system, its mechanical analysis modeling is difficult, and the efficiency is low. In this regard, it is researched that the object-oriented programming technique is applied to truss crane jib modeling. Proposing a generic modular truss jibs modeling based on parametric modeling for rapid modeling method and providing a new method for truss boom system simulation design is necessary. The development and design of truss boom system time can be greatly reduced by using the modeling method in the paper. The design efficiency can be improved significantly. This paper takes the VisualBasic as the programming platform making the truss boom of the all-terrain crane as an example to verify the effectiveness of the new modeling method.