the reason why 《Robinson Crusoe》becomes an immortal masterpiece also lies in its Authenticity and Extraordinary art performance.before that ,long novels in Europe are always based on achievments of great figures or romantic legend of knights and beauties.However Defoe started the attemption to try describing ordinary people in dialy language.though an imaginary story,the novel describes life on a desert island vividly and naturally,which indicates the author's fantastic imagination and art performance.Besides,the novel tells the story totally in first-person tone ,connects all story plots together copmletely through hero's confession and its language is plain.vivid and easy to understand.All the above add much to the fascination of the novel.