Abstract: With the gradual increase of the capacity proportion of energy storage in the new power system, the diversified and decentralized grid-connected energy storage equipment increases the difficulty of scheduling the system’s flexible resources. In order to realize the mining of distributed energy storage resources, a day-ahead optimal scheduling method for flexible resources considering multi-heterogeneous energy storage aggregation is proposed. Firstly, the operation mechanism of gravity energy storage, compressed air and electrochemical energy storage is analyzed, and the improved virtual battery(VB) model is used to unify and aggregate each energy storage model. Then, a two-layer scheduling framework considering system flexibility and heterogeneous energy storage difference is proposed. The fuzzy chance constraint and sensitivity analysis method are combined to balance the economy and flexibility of the system, and the power allocation considering the operating life of each energy storage device is realized. Finally, through the example verification, the scheduling method proposed can effectively reduce the scheduling time of the system by more than 9 times, and has obvious effect on unifying the operation of heterogeneous energy storage equipment and mining the flexibility of the system.