In the era of big data,competitive intelligence research should not only focus on the information technology achievements of intelligence collection and analysis,but also lay emphasis on the knowledge and intelligent support for improving the core capabilities of enterprises. The critical point of overcoming the challenges of big data is revealing the primitive common characteristics of competitive intelligence demand and the complete competitive intelligence knowledge system. Taking enterprise resources as the subjects of competitive intelligence analysis,this paper constructs a fine-grained knowledge element model of resources intelligence. Meanwhile,the knowledge framework of the enterprise resources is optimized based on the knowledge fusion method,which is regarded as the necessary priori knowledge of discovering implicit knowledge and evaluating core capabilities. The case study on the prototype system of technological innovation intelligence embodies the phased research results of the knowledge element construction and fusion of competitive intelligence based on enterprise resources,which also proves the feasibility of this study.