at present, most of the digital circuit transient fault repair methods need to be completed by manual processing, the repair efficiency is low and the energy consumption is high. For this, put forward a new kind of digital circuit fault transient low energy self repair method, design a repair system, which is mainly composed of self reconfiguration control module and execution module, self-discipline of the core control module is embedded Nios processor, digital circuit in the presence of transient fault, the wavelet neural network algorithm the diagnosis of digital circuit transient fault judging circuit, whether the normal operation of. The reconfiguration execution module consists of a logical computing node LC and an internal interconnection network. The main function is to maintain the function of the digital circuit and carry out the information transmission between the other modules. The experimental results show that the proposed method can effectively diagnose the fault, the success rate and the average fitness of the fault repair are high, and the overall performance is strong.