“对于”“关于”是《现代汉语》（黄、廖版下册）一书中标明的一组易混淆的近义介词。本文以近义介词“对于”“关于”为研究对象，从语义、语法和语用三方面对二者进行辨析。通过研究我们发现，它们的相同之处是，在语义上都是介词、引进受事宾语，用于分类、列举义；在语法上都可以带宾语、且多为体词性宾语，在分布位置上都可以分布在句首、句中，不可以分布在句尾；在语用上都有话题标记功能和篇章衔接功能。它们的不同之处是，在语义上“对于”侧重于引进动作行为对待的对象而“关于”侧重于表示关联、涉及的事物范围，“对于”能表示说话人的某种看法或观点而“关于”则不能；语法上“对于”多与数量短语搭配而“关于”则少与数量短语搭配，“对于”常分布在句中而“关于”则常分布在句首；语用上“对于”侧重于篇章管界功能，而“关于”侧重于提示功能。总之，“对于”“关于”两个词相同之处多、不同之处少，其语义上的差异较大、语法和语用上的差异较小。

"duiyu"(对于) and "guanyu"(关于) are a set of confusing synonymous prepositions indicated in Modern Chinese (Huang and Liao editions). This paper takes the synonymous prepositions "duiyu"(对于) and "guanyu"(关于) as the research object, and analyzes the two from three aspects: semantics, grammar and pragmatics. Through research, we found that they are all semantically prepositions, introduce subject objects, and are used to classify and enumerate meanings; In grammar, they can all have objects, and most of them are body parts of speech objects, and they can be distributed at the beginning of sentences and sentences, but not at the end of sentences; In terms of pragmatics, there are topic marking functions and chapter connection functions. The difference between them is that semantically "duiyu"(对于) focuses on the object treated by the introduction of action behavior, while "guanyu"(关于) focuses on indicating the scope of things related and involved, "duiyu"(对于) can represent a certain opinion or opinion of the speaker, while "guanyu"(关于) cannot; Grammatically, "duiyu"(对于) is more paired with quantitative phrases and "guanyu"(关于) is less paired with quantitative phrases, "duiyu"(对于) is often distributed in the sentence and "guanyu"(关于) is often distributed at the beginning of the sentence; Pragmatically, "duiyu"(对于) focuses on the chapter management function, while "guanyu"(关于) focuses on the hint function. In short, the words "duiyu"(对于) and "guanyu"(关于) have more similarities and few differences, and their semantic differences are large, and the differences in grammar and pragmatics are small.