The invention discloses a copper electrolyte extracting and purifying process technology which is characterized in that an extracting and purifying technique process is composed of methyl isobutyl ketone, bis(2-ethylhexyl) pyrophosphoric acid and a chelate extraction agent, according to the theory that Sb3+, As3+, Fe3+, Sn2+, Pb2+, cd2+, Zn2+, cu2+ and Ni2+ can be extracted respectively through extractants according to different acidity, the acidity and the extractants can be adjusted step by step, impurities in the copper electrolyte can be separated and removed in sequence, and the aim of purifying the electrolyte can be achieved. The copper electrolyte extracting and purifying process technology has the advantages of being high in extraction rate, complete in impurity separation, thorough in impurity removing, capable of effectively removing the impurities in the copper electrolyte, accordingly, current efficiency of the copper electrolysis is high, negative plates are good in quality, the phenomena of passivation, polarization, short circuit, resistance increasing and the like cannot occur easily, labor intensity of electrolysis operation workers is reduced, and the copper electrolyte extracting and purifying process technology is suitable for popularization and application in copper electrolysis enterprises.