Abstract Daniel Defoe is a great English novelist in the18th century. Robinson Crusoe, his masterpiece, is either a pioneering English adventure fiction or a typical colonial literature. It not only is a vivid narrative story about the surprising and adventuring life of Robinson, but also has the theme of colonism which is represented on a series of binary oppositional colonial discourses: the colonial country and the colony, master and slave, the white and the colored, central culture and marginal culture, civilization and savageness, Christianity and cannibals and all that. With post-colonial criticism as its visual angle, this thesis sets on the history of European colonialism, analyzes the description of characters, narrative words and the growing process of “Friday” who loses his national culture identity to deconstruct those colonial discourses, explores the strategies for colonist’s cultural colonization to those people in the colonies and reveals the dilemma of losing their national culture identity. This analysis gives us a new perspective in appreciation this classical work and a typical case study of how the colonists exert the cultural rule on the people in the colonies. Key Words Robinson Crusoe; colonialism; colonial discourses; cultural colonization