As an important part of"Plan for Strengthening Basic Disciplines",paleographical studies play a critical role in culti-vating cultural confidence.DUAN Yucai's Shuowen Jiezi Zhu is a comprehensive research to Shuowen Jiezi,providing rich em-pirical materials and insightful ideas for later researchers.This book contains detailed annotations of Chinese character develop-ment,especially the font,form and pronunciation.Taking the ancient-modern and the standardized-nonstandard characters as an example,this paper analyzes the definition and annotation in this book.This is to re-interpret the evolution laws of Chinese characters.