现代医学科学技术的发展和电子计算机通讯网络在全球的迅速普及,给传统的医学文献分类带来了深远的影响,客观上要求医学文献分类法在内容和形式上不断地进行调整以适应其发展的需要。《杜威十进分类法》(DDC21版)医学类表及美国《国立医学图书馆图书分类法》(NLMC)在内容和媒介上都作了调整。目前国内对这方面的研究尚存在许多空白。本文试图对DDC21版医学类表和NLMC作全面系统的研究,总结其特点,并提出进一步改进《中国图书馆图书分类法》(现称《中国图书馆分类法》,简称《中图法》)的设想。全文大致分3个层次:首先,就现代医学科学对医学文献分类的影响和国内医学文献分类法的研究现状作简要叙述;然后,就文章的核心内容展开讨论,深入分析了DDC21版医学类表的体系结构、标记方法、列类标准、复分系统,在此基础上重点论述了DDC21版的修订问题,并结合NLMC的整体类表情况,选取其特色类目与《中图法》医学类 The development of modern medical science and technology and the rapid popularization of electronic computer communication network in the world have brought a far-reaching impact on the traditional classification of medical literature, and objectively require that the medical literature classification be constantly adjusted in content and form to adapt to its development Need. The Dewey Decimal Classification (DDC21) medical list and the National Library of Medicine Classification of the United States (NLMC) have been adjusted both in content and in the media. At present, there are still many gaps in the research in this field. This article attempts to make a comprehensive and systematic study on the DDC21 version of the medical category and the NLMC, summarizes its characteristics, and proposes to further improve the “Library Classification of Chinese Library” (now called “Chinese Library Classification”, referred to as “Chinese Library Classification”) The idea. The full text is divided into three levels: First, the article briefly describes the influence of modern medical science on the classification of medical documents and the current status of the research on the classification of medical literature in China; then, discusses the core content of the article, in-depth analysis of the DDC21 version Based on this, the revision problem of DDC21 edition is discussed emphatically, and according to the overall situation of NLMC, the characteristic categories of DDC21 are selected and compared with the “Chinese Library Classification” medical category