The invention provides a power grid model division method and device based on an SCADA system, and relates to the technical field of power grid regulation and control automation, and the method comprises the steps: obtaining a power grid model based on the SCADA system; wherein the power grid model is equipment information of multiple kinds of equipment; and dividing the power grid model accordingto the region to which the equipment belongs to obtain a plurality of primary data regions. According to the method, when the power grid model is divided, processing tasks are effectively divided bycombining with the thought of power grid layered partition management in China, so that the real-time data processing efficiency of the SCADA system is effectively improved, and the system reliabilityis improved.