[Purpose/significance]The research aims to calculate the knowledge stock,knowledge flow and flow type in citation network,and reveal the structure,correlation and evolution of knowledge from different levels.[Method/process]The results of citation content analysis is integrated into the construction of citation network.Title,author,organization,journal title,year,keywords and other bibliographic data is mined and disassembled.The citation network is integrated and refined from three dimensions of author,institution,and subject.Meanwhile,Timing analysis is introduced to analyze the knowledge fl...