Abstract: During the period of Song and Yuan dynasty, Neo-Confucianism rose with Za Ju step in step.opinions vary in terms of the sprouting, prosperity and declining in its developmental course of Za Ju, but its deielopment course was,in essence,closely linked with the rise or fall of the social status of Neo-Confucianism. This paper triels to probe into the origin of the rise and decline of Za Ju in Song and Yuan dynasty from Neo-Confucianism's transmutation, and reveal Neo-Confucianism's profound influence on class...