This paper proposes a more suitable scheme for the practical application of micro-grid fault recovery .The micro-grid permanent fault is treated as a longer time transient fault and the network reconfiguration technology is used to optimize the micro-grid reconstruction. The mathematical model of micro-grid reconstruction is developed based on genetic algorithm with voltage stability as a precondition, ignoring the network loss, line capacity and some constraint conditions at the same time, and a minimum number of switching operations and restoring maximum load are taken as the target function. The CERTS micro-grid model is taken as a simulation example, and the results show that this scheme of fault recovery of micro-grid proposed here is valid and feasible.