The influences of multi-stage aging treatment on microstructures,electrical conductivity and hardness of Cu-Cr-Zr-Co-Si alloys were investigated by using optical microscopy（OM）,eddy current device and micro-hardness test,which was compared with those of ones with single-stage aging treatment.The results show that the multi-stage aging can promote the precipitation in Cu-Cr-Zr-Co-Si alloys and precipitates are more dispersive and uniform than those in alloys treated by single step aging.The effects of multi-stage aging on the electrical conductivity of Cu-Cr-Zr-Co-Si alloy can be ignored,however,it can improve significantly the hardness of the alloy.The secondary aging temperature in the multi-stage aging treatment process has an important effect on the final properties of the alloy.