Abstract—The paper analyzes Sierpinski self-similar feature of fractal, The paper also suggests product form modular design model and define multiple factors on complex product modeling through the interrelation between Similar Mapping and Fixed Point. The paper verifies the self-similar evolution method where the product gene feature can act as initial condition of complex product modeling by studying changing method for Sierpinski self-similar multiple form with combination of application of self-similar principle to complex product modeling design.