徐德庵是我国语言学知名学者，早年专攻文字、声韵、训诂之学，所撰论文既有师承，亦颇多创见，对研究汉语方言词汇、汉语词族、语音变易规律以及推求本字，探寻语根，考索联绵词的音义，均具参考价值。建国后主要研究古代汉语语法，在此新领域，不断探索、更新研究方法，走自创之路，抒新颖之见，对解决古汉语语法分析中的难题和丰富古汉语语法理论内容做出了很大的贡献。 Xu Dean is a well-known scholar of linguistics in China. He specialized in writing, phonology, and exegesis in his early years. His essays include not only teacher but also a lot of creative ideas. His research on Chinese dialect vocabulary, Chinese word family, phonetic variation rules, Roots, examining the meaning of words linked together, are of reference value. After the founding of the PRC, he mainly studied the ancient Chinese grammar. In this new field, he constantly explored and updated his research methods, went his own way and expressed novel opinions, and made the solution to the difficult problems in ancient Chinese grammar analysis and enriched the grammatical theory of ancient Chinese Great contribution.