Text phase of the Chinese characters, after two thousand years of evolution, from Seal script to Li, Li into Kai, phonogram was gained. Changes in the social unrest, the Chinese characters in the overall population surge, the trend of commonly used Chinese characters form to keep stability, it is necessary to start from the history of literature, combining qualitative and quantitative statistical method to carry on the inspection. So we select middle ages the most representative dictionaries “Shuo Wen” and “Yu Pian” comparative analysis, time distribution roughly the pre-Qin,Liang Han, Wei-jin, Liu Chao dynasties to Sui, Tang, Song, Yuan Dynasties, the multiple perspectives analysis investigation mediaeval period adverted use of inheritance.