Abstract: Labor thought is an important thought that runs through Marxist philosophy,and labor ethics is the core of it.The thought of Marxist labor ethics has gone through three stages: foundation,development and maturity. Economic and philosophic Manuscripts of 1844 is the beginning of the foundation stage,and the core ideas of labor ethics include that labor itself should be the inherent needs of workers,free and conscious activities, and the embodiment of free life;the labor process should be the harmonious unity of man and nature,man and man,and man and self;the result of labor should reflect fairness and the dignity and value of labor and workers.We should deeply excavate the thought of labor ethics contained in Marx's Economic and philosophic Manuscripts of 1844,so as to realize the modern turn of labor ethics of "being a human being".It is of great significance to clarify the subject status of workers,reflect on the anomie phenomenon of labor morality and build socialist harmonious labor relations.

Key words: Economics and Philosophical Manuscript in 1844, Labor Ethics, Contemporary value, Marx, alienated labor