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We present a high-efficiency multipartite entanglement purification protocol(MEPP) for electron-spin systems in a Greenberger-Horne-Zeilinger state basedon their spins and their charges. Our MEPP contains two parts. The first partis our normal MEPP with which the parties can obtain a high-fidelity N-electronensemble directly, similar to the MEPP with controlled-not gates. The secondone is our recycling MEPP with entanglement link from N'-electron subsystems (2< N' < N). It is interesting to show that the N'-electron subsystems can beobtained efficiently by measuring the electrons with potential bit-flip errorsfrom the instances which are useless and are just discarded in all existingconventional MEPPs. Combining these two parts, our MEPP has the advantage ofthe efficiency higher than other MEPPs largely for electron-spin systems.

High-efficiency multipartite entanglement purification of electron-spin states with charge detection