Abstract: Si/Al material has been more and more widely used in packaging of microwave modules for its excellent capabilities. To popularize the homemade Si/Al alloy, the powder-metallurgy (P/M) technique has been used to fabricate Si/Al alloy with series components and the capabilities of Si/Al alloy, such as post-processing, plating and laser hermetic welding are studied in this paper. The result shows that the physical performance of the homemade Si/Al alloy by powder-metallurgy processing meets the requirements of electronic packaging with light weight and high thermal conductivity and its processing, plating and laser hermetic welding performances also satisfy the hermetic packaging requirements，which proves the industrial application potential of the powder-metallurgy processed Si/Al alloy.