The market demand of automobile industry and driving axle housing is introduced. Based on the existing forming technology, a new processing technology for complex structure forming of driving axle housing is put forward. The key process matching this technology was designed. Aiming at the integral compound bulging of driving axle housing in the core process, the finite element method (FEM)was used to verify and analyze the integral composite bulging process.The results show that when the bulging temperature of the slotted tube blank is 600 ℃, the maximum stress of the bulging process reaches 243 MPa, which can meet the forming requirements of the driving axle housing.