Abstract: To address the issues of increasing energy storage investment costs and the mismatch between supply and demand in multi-cooling heating and power microgrids, a dual-layer optimal configuration method for electric-heat shared energy storage in combined-cooling, heating, and power microgrids is proposed. First, a new business model of electric-thermal shared energy storage station is proposed, and the service model, operation strategy and profit mechanism of electric-thermal shared energy storage station are analyzed. Secondly, a multi-objective dual-layer planning model is established with the lowest operating cost of the electricity-thermal shared energy storage station and the optimal economy of the combined-cooling, heating and power microgrid. The model is transformed and solved using the Karush-Kuhn-Tucker method. Finally, the numerical example verification demonstrate that the proposed electric-thermal shared energy storage operation model exhibits significant advantages in reducing costs and improving economy, thereby verifying the effectiveness of the proposed method in practical applications.