Based on the characteristics of electrical equipment configuration of a 110 kV intelligent substation, an optimized integration has been made of the secondary system equipment to strengthen its configuration function. The proposed integration scheme mainly includes: the optimized integration of the station control layer equipment, namely the application of integrated business platform; the integration of protection, controlling, measurement scheme; the integration of fault recorded data and the network analyzer; the integration of the intelligent terminal and merging units. Technical and economic analysis results show that the proposed integration scheme helps to improve the integration degree of the equipment, reduce the number of device configuration, and save the cabin area of the secondary system equipment, thus highlighting“resource saving, environment-friendly and industrialization-oriented”construction concept.