Based on the research topic mining and evolution analysis, this paper analyzes the subject structure, evolution law, hotspots changes and research frontiers of archival science research in China since the reform and opening-up. Some characteristics are found in archival science research since the reform and opening-up. Firstly,“archives resource construction and archives service”is the largest and most potential core topic community .Secondly ,before and after the formation of the topic of“archives resource and archival information resource”, the most obvious phenomenon of research topic differentiation and fusion has appeared.Thirdly, there has been an obvious phenomenon of“century fault”in the research hotspot of archival science in China.That “Internet +”,“big data”and so on have become the research frontiers of archival science. At the same time, there are some problems in archival science research.Firstly, the conservative thinking leads to lack of advanced research.Secondly, blindly pursuing research fever leads to insufficient research depth.Thirdly, there is conflict between foreign experience and domestic practice. Faced with the above problems, the archives community should plan goals to establish self-confidence, seek improvement in stability and hold reverse thinking, and have a right attitude towards differences.