Through the mathematical modeling of the variable-stiffness tow path, the topological structure of the variable-stiffness laminate is modeled. The fiber-angle and the layer-thickness of each lamina on each discrete unit can be designed independently. Then the topological structure is translated into GENESIS, in which the internal structure of the laminate is visualized, and the tensile properties of each lamina are analyzed. By comparing of the simulated results and the experimental data, the accuracy of the variable stiffness laminate tensile model is 95%. This method visibly reveals the location of the overlapped units, the distribution of the thickness and the distribution of fiber angle on each ply. It also accurately simulates the tensile properties of the laminate within the plastic range.