The  author  believes  that  LiaoPing’s  earher  writings  A  Textual   Research  on  the  present  and  past  Learning   and  A  Textual   Research  on  the   classical Learning  were of great importance  to classical  studies  in the Qing  Dynasty.Kang  Youwei  was  affected  by the Liao’s  works  which led  him into New  Text Classical  Studies,but his The  Confucian as  a  Pseudo-Classical Study  was not  a  direct elucidation  of  Liao’s  ideas.Although they were active  in the same period，Kang   kept abreast of  the changing currents and took ‘Gongyong’ as  a  tool for  his  reform movement.Conversely,Liao’s work  became more fantastic  and absurd .The author probes the influence  on his early writings,and the  factors that led  to the unusual  changes in  his  late  works.