Aiming at the problem of failure and insufficient drawing when stamping forming for complexstructure parts，we conduct numerical simulation of hydromechanical deep drawing to automobile front fender.According to the feeding law of fender，we propose three different drawing resistance coefficient programs，study theinfluence rules of main forming parameters on fender forming quality，like drawing resistance coefficient，chamberpressure，loading path，blank holder force，with the standard of forming limit diagram. The results show that underthe reasonable match of drawbeads，loading path and blank holder force，forming performance of fender could beameliorate，and obtain the part with uniform wall thickness distribution.