The invention relates to the electronic field, and particularly relates to an intelligent protection-signal modeling method based on interval division. The method includes the following steps: S1, graph detection, wherein drawing of a primary wiring graph of a power network is normative, complete and accurate is checked, and it is ensured that a power network model is relatively normative, complete and accurate from a graph drawing level; S2, topology relationship generation, wherein a graph topology structure of the power network is transformed into a data topology structure; S3, interval re-division and interval type judgment, wherein automatic division is carried out on a range of intervals on the basis of EMS power network model data and equipment topology relationships, and interval types are automatically judged; and S4, protection-signal interval matching. According to the intelligent protection-signal modeling method based on the interval division provided by the invention, interval matching is carried out on protection signals, a rule library of intelligent interval matching is formed, and an intelligentized matching mechanism is established.