【Purpose/significance】The scenario analysis method based on domain ontology model can solve the difficult problem of competitive intelligence in three aspects: competitive environment, competitors and competitive strategies.【Method/process】Based on the theory of description logic, semantic reasoning and scenario analysis, this paper designs a framework of competitive intelligence system based on domain ontology model for small and medium-sized enterprises. On the basis of analyzing the mechanism of the architecture, we use the ontology tools and several kinds of inference optimization rules to construct the intelligence knowledge base, the decision habit ontology base and the inference module.【Result/conclusion】The intelligent recommendation service can be implemented. This framework of competitive intelligence system plays an important role in the decision support for the competitive intelligence work of the small and medium-sized enterprises.