Custom aluminum alloy powder including the two components Al alloy powders as: AlCr, AlMg, AlTi, AlNi, AlFe, AlSi, AlZn, AlCu, AlB, AlMn, AlSc, etc. ; Three components Al alloy powders as: AlSiMg, AlSiCu, AlZnMg, AlMgTi, AlMgZr, AlMgSc and the other multicomponents aluminum alloy powders. Higher purity of the original elements. Small melting furnace for the cost saving R&D project.