Abstract: Contradiction is not only a widespread philosophical proposition but also an important motif in the World Literature.In The Unbearable Lightness of Being written by Milan Kundera,there are many contradictions,including light and heavy,flesh and spirit,fortuity and inevitability,dreams and reality as well as lies and truth.The symbiosis of these contradictions promotes the development of the plot and deepens the philosophical content of the work.By analyzing these contradictions,we can figure out Kundera's philosophical ideas which are of great significance in understanding the meaning of his works.