The Castle is the most important novel of Franz Kafka and the key to understanding him,and the identity of the protagonist K.in the novel is the key to understanding The Castle.K.claims to be a land surveyor hired by the castle,but it is not confirmed until the end of the story.The identities of the villagers in the novel who call themselves assistants,messengers,village chiefs,and hotel hostesses are also questionable.In fact,K.and these villagers are lying and disguising.Their disguised identities are constructed and dissolved in their lies.Disguise not only promotes the development of the plots,but also reflects the modern significance of the image"castle".