Abstract: Through rolling experiments and interface shear strength tests of cross-wedge rolled of laminated shaft made from 42CrMo/Q235 composites,the effect laws of process parameters including forming angle α,spreading angle β,area reduction Ψ,rolling temperature T and core material diameter d on the interface shear strength were analyzed.The research results show that the influencing sequence of process parameters on the interface shear strength is the Ψ,T,d,β,and α in turn.With the increase of area reduction Ψ,rolling temperature T and core material diameter d,the shear strength also increases,but the higher rolling temperature and the bigger core material diameter will decrease the shear strength.However,with the increase of spreading angle β and forming angle α,the shear strength decreases.The research results provide a basis for the optimal design of cross wedge laminated mold and strengthening the properties of interface bonding.