Abstract: In this paper,the relationship between supply and demand of system flexibility is analyzed,and a flexible resource operation-planning joint optimization double-layer configuration model is established. The operation layer introduces the lack of flexibility rate as the evaluation index of system flexibility. This layer takes the network loss,wind power and photovoltaic curtailment to the economic penalty. And the operation layer takes the system annual operating cost as the goal. The planning layer introduces the system comprehensive safety index to the system security. This layer is aimed at optimizing the overall annual cost of the system. The double-layer configuration model is solved by particle swarm optimization algorithm. Finally,the example is simulated by IEEE 33 node distribution network system. The results show that the proposed operation-planning joint double-layer configuration model can effectively reduce the network loss and the amount of abandoned wind and light,and improve the economic,safety and flexibility of the system.