[目的/意义]介绍美国印第安纳州与蒙大拿州数字资源长期保存的实践，为我国图书馆数字资源保存工作提供参考与借鉴。[方法/过程]从组织架构、政策与资金支持、技术服务平台及项目的特点等方面对美国印第安纳州与蒙大拿州数字资源长期保存的实践进行对比分析，归纳总结数字保存的方法与经验。[结果/结论]获得的启示包括：利用全国高校图工委各级组织开展自上而下的宣传教育；建立可持续发展的资金支持机制；在合作基础上开展试点项目；评估本机构的数字保存现状并明确数字保存的需求；参考数字资源保存的成熟案例制定数字保存政策；选用合适的技术平台与服务。
[Purpose/significance] The paper introduces the practice of long-term preservation of digital resources in Indiana and Montana, and provides reference for preservation of digital resources in libraries in China. [Method/process] The practices of long-term preservation of digital resources in Indiana and Montana are compared and analyzed from such aspects as organizational structure, the policy and fund support, the technical service platform and the features of the project, and the methods and experience of digital preservation are summarized. [Result/conclusion] Main enlightenments: conduct top-down advocacy and education training of the long-term preservation of digital resources by the Steering Committee for Academic Libraries of China at different levels, establish a capital support mechanism for sustainable development, carry out pilot project on the basis of cooperation, assess the present situation of digital preservation at each institution to identify the demands of digital preservation, make policies by reference to the mature digital resources preservation model, and select the appropriate technical platform and service.
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