The basic requirements,the importance and the advantages of applying EDl to China Railway Operating Management Information System are discussed with empha sis and a conception on the application of EDl to the railway system is put forward.

• 本文着重论述了在我国铁路运营管理信息系统（OIS）中应用EDI的基本需求和重要性以及铁路OIS应用EDI的有利条件，并提出了在铁路OIS中实施EDI的构想。