A new application based on the parameter modeling method of MSC.Patran and generation algorithm was proposed to design the clamp band joint. First, finite element techniques for 2-dimension axisymmetric analysis of clamp band joints were developed, including the modeling of V-clamp, strap pre-tension and loads, and the optimizing constrains and objectives were also introduced. Then a clamp band joint with the diameter being 3m was designed via the presented method. Finally, a 3-dimension finite element model of the designed clamp band joint was established and analyzed. It indicates that the method is applicable to the design of clamp band joints, that the connective stiffness is strengthened by increasing the length and height of the inner ring of the interface rings, and that the modeling method is proved to be valid by the agreements of the finite element analysis results of 2-D model and 3-D model.