This paper analyze patent data in the field of biomedicine in Jiangsu Province through social network analysis ,study the characteristics of the flow of biomedical innovation knowledge. This study pay attention to patent citation and innovative knowledge flow in the biomedical industry in Jiangsu Province through network integrity analysis, individual network analysis, network centrality, and network structure hole analysis.The results show that the citation of biomedical patents exhibits relatively obvious subgroup characteristics, Universities occupy an important position in biomedical patent technology and assume an important role as a bridge for knowledge flow, especially China Pharmaceutical University has obvious structural hole features.