Abstract: Marxs labor philosophy brings the nature and society into social practice,especially the labor practice of material production,and reveals the essence of human social moral relationship for the first time.Social moral relationship is a social relationship formed by people in social practice,which can evaluate good and evil.The practice of material production and labor is the fundamental reason for the emergence and development of social moral relations.In the moral relations of private ownership society,the antagonism between the interests of individuals,others,social organizations and the whole society occupies the dominant position.Labor liberation and labor freedom brought by the progress of material production and labor are the fundamental force to solve the contradictions of social moral relations.With the development of labor liberation and labor freedom,the unity of various contradictions in social moral relations will replace antagonism,which occupy the dominant position of contradictions.

Key words: Marx, labor philosophy, social moral relationship