A sad melodyAbstract: Fox demon literary works have a unique position in China , favored by a lot of In each different period, there will be a number of excellent As the writers characterize the image of Fox, there formed unconsciously a unique culture of China - Fox "Fengshen Yanyi", "Liaozhaizhiyi" "Zhu Xian" This three different period works, although with different literature definition, people are all involved with demon and fox demon all I picked up the following three images: a dark evil Daji, simple and good Feng SanNiang, peaceful X although their characters, situation, were different, in the end, they were all more or less From the setting environment of the text, the thought of the writers, the influence caused by the social environment where the writer lived, Chinese traditional thinking and Taoism, I analysed the cause of the Key words: Daji; Feng San Niang; Xiaobai; Writer; Social background; Taoism