Abstract: As an important guarantee for the self-healing ability of an intelligent distribution network, fault recovery has been very important for the operational reliability of the system. For the distribution network fault recovery with distributed photovoltaic grid connection, considering the photovoltaic output and load level changes during the fault period, a dynamic fault recovery is built. Taking the minimum load loss as the objective function, considering the network radiation, power balance and node voltage constraints, the switch state intensive beam and other necessary constraints, the recovery method is established. By changing the switch state set of the system during the fault period, the established model makes the fault recovery scheme adapt to the operational conditions, so as to reduce the load loss. The elite strategy of population and chaos search are used to improve the basic firefly algorithm, and it is used to design and solve the model. Finally, the effectiveness of the model is verified by a simulation example.