This paper studies the naturalist fictions containing student immigrant plots written by Zi Yu. Zi Yu was born in Manchuria and completed his university schooling in the 40s. It was clear that Zi Yu had been influenced by Japanese and Shanghai modernist fictions, and the newly industrialized Taiwan socialites inspired him to write fictions in the 60s and 70s. His fictions containing student immigrant plots are different from those written by Taiwanese students studying abroad and eventually relocated in USA. The latter are known for being the themes of uprooted, migration, diaspora, and national identity. However, Zi Yu pays attention to human nature and particularly in generation gap, love and betray, paradise seeking, and job hunting issues.