The aluminum alloy auto panel strength beam was numerical simulated by FEM software while press force, the depth, die radius, punch radius of draw bead were independent variables, the data about the crack, winkle and the thinning were acquired by an orthogonal experiment. Then the grey relational generating between forming process and the single objective function, the grey rational grade of multi-objective were calculated by the grey theory system, thus the multi-objective design was changed into the single-objective design. Furthermore the average grey relational grade of the forming process was analyzed. Employing the optimization data, the auto panel forming was numerically simulated. The conclusion demonstrated that the sheet forming quality is obviously increased by the optimized forming process parameters. 