Abstract: 【Purpose/significance】Based on information theory, this paper puts forward a method of patent network community discov⁃ ery and core patent identification, which integrates attributes and relationships, aiming at balancing the individual characteristics of patents and the integrity of the network【. Method/process】On the basis of constructing patent citation network, Derwent manual code and keywords were used to participate in Walktrap community discovery algorithm, and the patent technology field was subdivided. Under the condition of technical field subdivision, the patent identification index system is constructed by integrating attributes and re⁃ lationships, which quantifies the importance of patents and identifies core patents based on it.【Result/conclusion】The empirical re⁃ sults show that: This method has the advantages of both patent identification index system and network analysis technology relation⁃ ship; Under the condition of subdividing technical fields, the recognition results are more accurate【. Innovation/limitation】Due to the research content and other reasons, this paper only discusses the patent network analysis method of comprehensive attributes and rela⁃ tionships from the perspective of citation relationship, and will continue to explore the influence of other relationships in the future.