Abstract: LB27 and LB20 aluminum-clad steel wires were prepared by continuous extrusion cladding of aluminum with SWRS72A steel and SWRS82B steel, respectively. Samples before and after cold drawing were prepared and tensile experiments were conducted on them at room temperature. The tensile properties and fracture morphology of the samples were studied. The results show that the yield strength and tensile strength of the SWRS72A steel without aluminum cladding were higher than those with aluminum cladding before cold drawing. Compared with SWRS72A steel without aluminum cladding, the yield strength of the LB27 aluminum-clad steel wire was higher, but the tensile strength decreased slightly. The elongation of the LB27 aluminum-clad steel wire decreased significantly. With the increase of outer diameter, the yield strength of the LB20 aluminum-clad steel wire decreased gradually, but was greater than that of the LB27 aluminum-clad steel wire. The fracture morphology of the LB20 aluminum-clad steel wire was similar to that of the LB27 aluminum-clad steel wire, but shear lip existed at the edge of the steel of the LB20 aluminum-clad steel wire.