The invention discloses an optimization method for virtual circuit design of smart substations. The optimization method comprises the steps of 1) performing virtual terminal standardization design: according to different primary wiring methods and secondary equipment configuration methods in smart substations at different voltage degrees, setting unified and specified relevant virtual terminal standardization design; 2) establishing a smart substation summarization virtual terminal table: combining the virtual terminal tables of various smart substation equipment to form a summarization table and adding interval description attributes; 3) correlating the virtual terminals with identical signal descriptions and interval descriptions and connecting the virtual terminals with consistent signals by using an auxiliary design tool. The optimization method for virtual circuit design of smart substations has the advantages that the virtual circuit design process of the smart substations can be optimized, the workload at a design stage is reduced, and the burdens and the potential hazards caused by substation information digitalization and networking to the current smart substation design work are avoided.