A mixture of Sn–Bi eutectic alloy powder, Cu powder and Cu fibre was used as raw material and semifinished micro parts were fabricated via micro-ultrasonic powder moulding (Micro-UPM) in a special semisolid form. The micro parts were obtained after sintering at 750°C for 10h and then cooling to room temperature in a furnace. The micro parts were investigated by DSC, metallographic analysis, XRD and tensile tests. The low-melting point Sn–Bi eutectic alloy was completely disappeared after the alloying treated with copper, which resulted in a remarkable increase in the thermal and mechanical properties of the micro parts.