The invention discloses a design method for a transformer substation graphic element in a power grid wiring diagram. The design method comprises: remaining a circular foundation of the transformer substation graphic element unchanged, and adding a metal effect to make the graphic element stereoscopic; putting main transformer information outside the circle in circular arrangement, which is convenient for addition and deletion; adding main transformer outage information; adding a water level effect; floating the real-time power of the transformer substation on the water level to be located in the middle of the diagram; adding a transformer substation information early warning function; and showing different warning modes for different abnormal conditions to enable more visual information presentation. The design method for a transformer substation graphic element in a power grid wiring diagram allows globally and comprehensively visual discovery of operating information of equipment to help the dispatching operating personnel with learning about transformer substation operating information at any time and grasping power grid operating conditions.