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IVECO light-duty vehicle hood inner panel was taken as an object to simulate, which used CATIA software as modeling tools and the surface data in an IGES format was imported to DYNAFORM for forming simulation. On the base of summing up the latest achievement made both at home and abroad, the practical application of sheet metal forming numerical simulation was discussed and further researched. The influences to the forming quality of these factors such as blank size, drawabeads binder force and lubricative condition have been analyzed, and through the optimization of these factors, cracking and wrinkling were eliminated. This effect of optimization has been verified through the comparison between simulation and the test results.