论述主题目录的发展概况，分析主题目录的特点和推行主题目录不力的原因。根据中国科学院上海文献情报中心编制主题目录的实践，指出在我国推行主题目录的时机已成熟 Discusses the development of the theme directory, analyzes the characteristics of the theme directory and the reasons for the poor implementation of the theme directory. According to the practice of preparing thematic catalogs by the Shanghai Documentation and Information Center of the Chinese Academy of Sciences, it is pointed out that the time has come to implement thematic catalogs in our country