The invention provides a graphical intelligent transformer substation pattern implementation method based on computer-aided design (CAD), which is characterized in that two functional modules including a graphical edit module and a model edit module are arranged in the CAD; the graphical edit module is used for drawing a conventional drawing and expanding attribute definition functions; the model edit module is used for finally generating a model file and supporting the high-order functions of importing, exporting, editing and verifying files and the like; and the graphical edit module and the model edit module carry out sharing operation on model information by accessing an extensive makeup language (XML) database interface. In the graphical intelligent transformer substation pattern design method based on the CAD provided by the invention, by developing graphical model design software based on the CAD, the design and the system of the intelligent transformer substation are integrated, thus not only realizing to carry out first and second wiring diagrams of the conventional transformer substation in the design, but also finishing the complete data model configuration of the whole substation and data stream connection of the transformer substation according to the interface control document (ICD) model files provided by equipment manufacturers and the configuration principle of the first and second equipment of the transformer substation.