Abstract: In this paper, the circuit system design based on Evolvable Hardware (EHW) and dual hot-backup technique was proposed. It made full use of the advantages of EHW. Both the reliability of traditional redundant fault-tolerant and hardware resource consumption was considered. The universal circuit model based on EHW and dual hot-backup technique was designed. The flow of fault self-repair was analyzed in detail. The fault self-repair circuit system design can be guided by it. It will have important engineering application value.