Abstract： Taking auto inner panels as a research object, a mathematical model for studying the relationship among the friction coefficient, blank holder force, sheet size, the coefficient of drawbeads restraining force with springback and thickness of sheet metal was built based on modelbased calibration (MBC) toolbox using Matlab software in order to study the influence of process parameters on the springback and thickness of sheet metal. An multiobjective function was optimized to get the best combination of parameters by the CAGE optimization module in modelbased calibration toolbox, namely, the friction coefficient is 0.125, the blank holder force is 350 kN, the sheet size is 250 mm×360 mm, the coefficients of drawbeads restraining force are 20%, 10%, 6%, 35%. The numerical simulation and experimental results indicate that this method is feasible.