In the multi-station integration scenario of five stations in one of“new energy station- electric vehicle charging station- 5G station- data center- substation”, making full use of the backup energy storage capacity of 5G base station and data center is an important way to improve the economy of multi-station integration. A multi-time scale trading mechanism for sharing the backup energy storage capacity of 5G base stations and data center under the multi-station integration mode is proposed. Firstly, 5G base station and data center call energy storage capacity model based on the“energy storage spare time”is set up, and then the shared energy storage problem is transformed into electricity trade problem to established the internal power price trading model, which can dynamically adjust the power price, make more station system internal trading more economical according to the internal power trading demand. Then, a multi-time scale trading mechanism of pre-day declaration- day adjustment is established. In the day- daytrade, the electricity trade are cleared through the internal electricity price trading model, and a compensation scheme based on the deviation of the contact line is established in the intra-day trading.Finally, the validity of the proposed trading mechanism is verified by example.