《雨月物语》是日本江户时代读本小说的代表作,其中最杰出的篇章便是《蛇性之淫》。《蛇性之淫》在翻案中国明代冯梦龙所创作《白娘子永镇雷峰塔》的基础之上,融入了日本特有的文化元素,呈现出异样的文学性。两部作品表达主题的不同使得人物形象也产生差异。文中重点比较了“法海”这个唯一同时出现在两部作品中的人物形象,并探究其人物形象出现偏差的原因。 “Moonlight Story” is a masterpiece of Japanese novels of the Edo period, one of the most outstanding chapter is “snake sex.” On the basis of transposing the “White Snake Wing of the White Snake” created by Feng Menglong in the Ming Dynasty in China, “Snake Sexual Obscenity” merges with the unique Japanese cultural elements and presents a distinctive literary character. The difference between the two subjects in expressing the theme also leads to the difference in characters. The article focuses on the comparison of “Fa Hai”, the only person who appears in two works at the same time, and explores the reasons for the deviation of her characters.