Abstract
Harry Potter is the representative work of British female writer J.K. Rowling, which has been translated into seventy-four languages and over 500 million copies have been sold worldwide.
As an important character in the book, Severus Snape plays a role in pushing forward the plot. Readers really sympathize with his multiple personality and tragic fate. His infinite love for Lily Evans has moved millions of people. By analysing the multiple characters and tragic fate of Severus Snape, this thesis intends to demonstrate the charm of characterization, point out the complexity and elusiveness of human nature, and the role this character plays in elevating the position of the work.
Keywords   Harry Potter   Severus Snape   Multiple Personality   Tragic Fate 

《哈利•波特》是英国女作家J.K罗琳的代表作，被翻译成了74种语言，在世界范围内的总销量达到5亿本。
作为书中的主要人物，西弗勒斯•斯内普对推动情节有着重要作用。他的多重性格和悲惨命运，让读者为之同情慨叹。而他对莉莉的一片深情，更是感动了无数读者。本论文通过分析该人物的多重性格和悲惨命运，展现人物的魅力，指出人性的复杂和难以琢磨，探究其该人物形象对提升小说地位所起的作用。
关键词  哈利•波特   西弗勒斯•斯内普   多重性格   悲惨命运

Harry Potter is the masterpiece of the English writer J.K Rowling. The series of Harry Potter have seven books in total, of which the first six books mainly describe the hero Harry Potter’s six-year school life and adventure stories at Hogwarts School of Witchcraft and Wizardry, and the last one tells the story that Harry searched for the Horcruxes (a magical object used to store part of a person's soul, protecting them from death) and finally defeated Voldemort (Harry’s archenemy). It is a miracle in the history of literature that the story attracts countless readers and brings the world literature into a new trend.