本文以太宰治描写鲁迅(周树人)青年在日留学时代的作品《惜别》为中心,阐述太宰治心中“周树人”与“鲁迅”的差别以及为何选择了青年时代的周树人为主人公的原因。同时通过对作品中周树人的人物分析,找出其与太宰治的重合之处,最终得出“分身文学”为太宰文学的特征之一的结论。 This article takes Tai Zaizhi’s description of the “farewell” of the youth of Lu Xun (Zhou Shuren) in his study days in Japan as the center to explain the differences between Zhou Shu and Lu Xun in his mind and why he chose Zhou Shuren as the protagonist in his youth. At the same time, through the analysis of the characters of Zhou Shuren in his works, he finds out the coincidence between him and Dazai and finally concludes that “Distinguished literature” is one of the characteristics of Dazai literature.