The invention provides a conversion method for vector graphics of a transformer substation. A graphics file in a scalable vector graphics (SVG) format supported by a monitoring system of the transformer substation is converted into a graphics file in a G language format adopted by an intelligent scheduling system. The method is characterized by comprising the following steps of: 1, resolving an SVG graphics file, and analyzing each power device layer node, wherein the power device layer nodes are SVG graphics nodes; and 2, dividing power graphics objects of a power device layer in the SVG graphics file into nine categories of a generatrix, a power transformer, a text layer, a connecting line layer, an alarm window, an elliptic arc and other ordinary conduction devices, and converting the power graphics objects into graphics in the G language format according to attributes respectively.