Abstract：Focusing on the robust problem existing in the constructing automotive product platform which should meet customer variable requirements，the spatial variety index model was created based on the product development theory with the quality function deployment tools, the method for reducing the uncertainty by adjusting the spatial variety index and standardizing was put forward. To verify the feasibility of the spatial variety index model, the case study method was adopted and one global product platform collaborative development project from an automobile enterprise in Shanghai was put into the spatial variety index model. Then, according to the results, the related advices were brought forward. Evidently, the spatial variety index model was effective for reducing the uncertainty and improving the company competitiveness.