Abstract: The SCR(Shearing-Cooling-Rolling) and conventional casting technology were compared in the preparation of Al-1.5Mg-0.3Sc(wt%), with the effect of trace of Sc addition on the microstructure and property of Al-1.5Mg-0.3Sc(wt%) alloy wire formed by SCR technology investigated. The results showed that the grain of SCR-formed alloy wire is smaller than that of the alloy wire formed conventionally. The latter, after its specimen was metallographically etched, presents the back and irregular lamellar structure at its grain boundaries with some Al3Sc precipitates found at arc boundaries. But, the former, when its specimen was solid solution at 520°C and aged at 320°C for 3 h, its tensile strength is 304 MPa with an elongation 18.9%. It revealed that the SCR-formed alloy wire has higher strength and plasticity.