This article explores the construction strategy of discourse system in archival discipline from the perspective of the first-level discipline framework of information resource management under the trend of informatization.Firstly,based on the first-level discipline framework of information resource management,the internal logic and structural relationship of the framework are clarified.Secondly,this paper analyzes the position of archival discipline in the first-level discipline framework of information resource management and discusses the influence of information environment on archival discipline,proposing five principles,six steps,seven measures and interdisciplinary research methods for constructing the discourse system of archival discipline in the information environment.Finally,focusing on the future development trend of the discourse system of archival discipline,it is pointed out that this discipline should broaden its disciplinary horizon,strengthen the research efforts of cross-integration,so as to promote the sustainable and healthy development of archival discipline.