Abstract: As the storage and sharing platform of scientific research achievements, institutional repository is widely used in universities. The establishment of institutional repository can promote the subject service of library. This paper took the Library of Central China Normal University as an example, and discussed the construction mode of institutional repository, expounded the design goal, platform architecture, function module and platform application. The construction of institutional repository in Library of Central China Normal University can help students' study, contribute to the scientific research of teachers, and promote the level of library's subject service.