《尔雅》是我国最早的训诂学专著,其中有许多是对我们研究命名理据有用的材料。本文在前人研究的基础上,探讨其中河流类名物词的命名之由,共分析出六大类河流类名物词的命名理据,分别是:形象理据、功能理据、语音理据、意义与声音理据、性质理据、位置理据。 “Er Ya” is China’s earliest monographs, many of which are useful materials for our study of the nomenclature. On the basis of previous researches, this paper explores the naming conventions of river class names, and analyzes the naming conventions of the six categories of river class noun, which are: image reason, function reason, phonological motivation, meaning and sound motivation , The nature of the rationale, the basis for the position.