[目的/意义] 研究知识管理理论中的SECI模型在专业图书馆学科情报服务中的应用及创新实践，旨在完善学科情报服务中的知识管理，有效提升服务水平，巩固和增强专业图书馆学科情报服务的竞争力，并为SECI模型在学科情报服务中的有效应用提供参考。[方法/过程] 构建基于SECI模型的专业图书馆学科情报服务模式，在此基础上加以实证分析，对中国科学院文献情报中心基于此模式开展的创新服务实践进行总结。[结果/结论] 隐性知识与显性知识的转化蕴含在学科情报服务的多个环节中。将SECI模型引入专业图书馆学科情报服务中，可以解决学科情报服务中知识管理过程中的一些不足，为专业图书馆开展学科情报服务创新实践提供思路及方法上的指导，有效促进学科情报服务核心竞争力和整体服务水平的提升。

[Purpose/significance] This paper studies the application and innovative practice of SECI model in professional library subject information service, aims to improve knowledge management and service level in subject information service, consolidates and enhances the competitiveness of subject information service. It hopes to provide a reference for the effective application of SECI model in subject information service. [Method/process] The professional library subject information service model based on the SECI model was constructed. Based on this, an empirical analysis was carried out by summarizing the innovative service practices of the National Science Library, Chinese Academy of Sciences based on this model. [Result/conclusion] The transformation of tacit knowledge and explicit knowledge is embedded in multiple links of subject information services. Introducing the SECI model into the professional library subject information service can solve some shortcomings of knowledge management in the subject information service, provide guidance and methods for the professional library to carry out innovation practices of subject information service, and effectively promote the core competitiveness and the overall level of the subject information service.