The invention relates to the technical field of design on secondary systems of intelligent substations, particularly relates to an expressing method for virtual terminals of a secondary system of an intelligent substation, and specifically relates to a graphical expressing method for connection of virtual terminals of a secondary system of an intelligent substation. A two-dimensional graph for connection relations of the virtual terminals is automatically generated by using connection information. The graphical expressing method is mainly suitable for designers of an electric power design institute; and in a designing work, the intelligent substation is designed by using auxiliary design tool software. The connection relations of the virtual terminals in a designated area are described by using the two-dimensional graph; an attention range of the connection relations of the virtual terminals can be reduced for the designers by grouping different layers of the connection relations under different granularities, connection of the virtual terminals is quickly positioned, so that the designing efficiency is remarkably improved, the work efficiency of manual examination is improved, and mistakes caused by human factors are reduced.