Abstract: To achieve the economic operation of grid-connected microgrids, this paper introduces an optimization scheduling method based on the improved spotted hyena optimization（ISHO）algorithm.The scheduling model aims to minimize total scheduling costs, including maintenance costs for micro-power sources, diesel engine generation, and electricity purchase and sale costs.The spotted hyena optimization（SHO）algorithm is improved through strategies such as logistic mapping, nonlinear decreasing control parameters, and reverse learning to obtain the ISHO algorithm.The ISHO algorithm is used to solve the scheduling model, and its optimization performance is compared with other algorithms.The results show that the ISHO algorithm achieved the lowest scheduling cost of 3575.25 yuan, demonstrating higher accuracy than other algorithms, thereby verifying the effectiveness of the ISHO algorithm in microgrid optimization scheduling.