It takes a long time to artificially connect the virtual terminal of a secondary substation of an intelligent substation, and the quality of the completion is affected by human factors. Based on the virtual terminal function description information, this paper puts forward a method that calculates the semantic similarity of virtual connections through historical virtual connection data, establishes a mathematical model for automatic matching of virtual terminals between secondary devices, and uses the probability to complete the screening of matching results. The secondary sub-equipment of the intelligent substation is divided according to the typical secondary interval, and the virtual terminal connection problem of the intelligent substation is simplified to the virtual terminal matching problem of the secondary devices in the secondary interval. Finally, the effectiveness of the proposed method is verified with the example of the 220 kV intelligent substation of Qianqi. This work is supported by Science and Technology Project of State Grid Corporation of China (No. SGHAJYOO SJJS1700022).