For DP600/AA1060 (dual-phase steel/aluminum) laminate produced by angular co-extrusion process, the interfacial mechanical properties and microstructure of laminates at different annealing temperatures of 490, 520 and 550 ℃ were explored. Then, the mechanical properties of metal at the interface and on both sides were studied by interfacial shear test and micro-hardness test, and the influences of different annealing temperatures on the interfacial morphology change and composition distribution of laminates were analyzed by scanning electron microscopy and energy dispersive spectroscopy. The results indicate that annealing treatment contributes to the increasing of hardness in the bond region of laminates. With the increasing of annealing temperature, the interfacial shear strength increases. The interfacial shear strength at 550 ℃ increases by 2.2 times higher than  that without annealing. With the increasing of annealing temperature, the discontinuous diffusion layer appears at the steel/aluminum interface. Additionally, the primary failure mode of the interface transitions from brittle fracture to ductile fracture, and the plastic deformation ability of laminates is improved.