Introduction to Flaubert: Gustav Flaubert (182 1- 1880),1a great French critical realist novelist in the middle of the 9th century, was once regarded as a teacher by guy de maupassant. His famous works include Madame Bovary, Emotional Education, Three Stories and Boide and Petruchi. He attaches great importance to the perfection of art and language. Moreover, it had a far-reaching influence on the development of literature from the end of 19 to the 20th century, especially the development of modernist literature, and was known as "the originator of naturalistic literature" and "the founder of western modern novels".