为了满足各图书馆文献分类的需要,《中图法》编委会在《中图法》(第四版)的基础上进行了修订,在《中图法》(第五版)出版之际,笔者作为新版分类法修订课题组成员,就《中图法》(第五版)“P天文学、地球科学”类目的修改特点进行分析,以方便图书馆标引人员快速熟悉、掌握新版分类法。 In order to meet the needs of each library’s document classification, the editorial board of “Chinese Library Classification Law” was revised on the basis of “Chinese Library Classification Act” (the fourth edition). At the publication of “Chinese Library Classification” (the fifth edition) As a member of the revised edition of the new taxonomy, the author analyzes the characteristics of the revision of the “Chinese Library Classification (Fifth Edition)” and “P Astronomy and Earth Science”, in order to facilitate rapid familiarization and mastering of library indexers New classification.