The objective of the present study was to propose a new approach to optimize the geometry parameters of ceramics die in deep drawing process. The optimization problem has been formulated with the objective of optimizing the maximum principal stress in the full stroke of deep drawing process. In this study, FEM software was used to simulate the stress distribution on the die surface and predict the brittle cracking occurrence on the die surface. Accordingly, the optimum ellipsoid curvature on the curved surface of die hole can be obtained, and thus process design optimized.