Abstract：Alienated labor and private property has a very important status in Marx's work-Economic and Philosophical Manuscripts of 1844, because it profoundly reveals the shortcomings of capitalist society from the perspective of philosophy.The present paper explores the alienated thought in Alienated labor and private property from the perspective of the Life Philosophy.Firstly, it describes the four manifestations of alienated labor.Secondly, it points out that alienation of labor, in essence, is the deviation of the existence of human life.Finally, it reveals the significant impact on human life caused by alienated labor and all kinds of alienation in capitalist society, as well as the practical significance of the study on Marx's theory of alienation today.

Keyword：alienated labor;alienation;the Life Philosophy;the existence of life;