Taking CSpace DR developed by Lanzhou Literature and Information center of the Chinese Academy of Sciences as the research object, this paper introduces and studies the integration function of knowledge resources in the professional domain that CSpace DR should have. It is found that although CSpace DR provides users multi-dimensional heterogeneous knowledge resource integration services through knowledge discovery and knowledge organization, CSpace DR has yet to improve the entity specification processing of heterogeneous knowledge resources and the construction of knowledge resource selection evaluation system.