Abstract:Absrrac:Scholars have made marvelous achievements in the research of S.202 Shang hanlun, yet there are some knotty problems to be urgently solved. On the basis of research achievement,the paper attempts to interpret knotty characters in S.202 Shang hanlun with the knowledge of philology, based on the evolvement rule of Chinese character,combining the different text in handed-down documents and try to reveal the original face of S.202 Shang hanlun.The conclusions offer a reference for further study on S.202 Shang hanlun.