Shuowen Jiezi compiled by XU Shen is the first dictionary in China to systematically explain meaning of character, decompose font and distinguish pronunciation of words. The book shows a variety of Chinese fonts before the Eastern Han and records ancient sound materials and culture of Chinese character. Scholars of all dynasties attaches great importance to Shuowen Jiezi after the publication of Shuowen Jiezi. A lots of classic ancient works regard the explanatory notes of Shuowen Jiezi as an important basis, and quote the content of Shuowen Jiezi to annotate has become a common method of academic research. Analysising and Researching content of the materials quoted from Shuowen Jiezi in all kinds of literature is helpful to explore the original appearance of Shuowen and the development law of Chinese characters. Wuche Yunrui is a non-official encyclopedias book compiled by Ming’s historian LING Zhilong which collected and collated classic words, poems and allusions to become an important tool for ancient literary creation to select words and allusions and rhyme couplets. Arrangement of Wuche Yunrui is following the rhyme. That is each word and allusion is collected into each rhyme according to the rhyme at the end of the word, and fully explainning the meaning, pronunciation and font of the first word of each rhyme. Wuche Yunrui widely quotes many ancient literatures and materials such as Shuowen Jiezi, Erya, Shiming, Guangyun, Yupian, Jiyun to definite the first word of rhyme, among which quotes the most from Shuowen Jiezi. This study takes definition content of Shuowen Jiezi quoted by Wuche Yunrui as the research object. On the basis of exhaustively collecting the definition materials of Shuowen quoted by Wuche Yunrui, taking current version of XU Xuan’s Shuowen Jiezi as the comparison object, the paper compares the definition materials of Shuowen quoted by Ling Zhilong’s Wuche Yunrui with current version of XU Xuan’s Shuowen Jiezi, corrects the errors and omissions of this two books, analyzes the reasons for the different definitions, and finds out meaning evolution process and law of Chinese characters.