By analysis of representative papers from Chinese Citation Index Database, the authors find 4 research issues, 7 mechanisms and systems of integration and services of national digital archival resources have been discussed in the field. There are broader and narrower understandings of national digital archival resources and there are three perspectives of integration and services in terms of their intentions. The paper argues that a broader view and a new perspective of collaborative innovation is the future trend, current studies have 6 limitations. Based on the above studies, the paper gives recommendations for future research.