The invention discloses an intelligent substation secondary equipment interactive graph representation and using method, which comprises steps: displaying methods of a secondary device, spacing equipment and a switch participating information interaction are set, and a method of displaying information interaction among the secondary device, the spacing equipment and the switch is set; and engineering commissioning and maintenance are carried out according to the set display result. The invention also discloses a device for realizing the above method. Data transmission in a communication network can be clearly and intuitively represented, a user can quickly and accurately determine a data interaction relationship between the secondary equipment according to a graph represented by the method, and convenience is provided for engineering commissioning and maintenance.