The core purpose of the proposition of coupling moral education and public person cultivation in colleges and universities is to reverse the decline of the public orientation of college students. The coupling and isomorphism of school moral education and pub? lic education has realistic premise and logical mechanism, that is to say, in the optimization of education structure, the two are extend? ed, different and mutual, effectively embedded into each other and become an important part of each other’s whole structure; In the function of education, the two attributes are connected, and in the mutual integration of the two gene attributes to achieve mutual em? powerment and stimulate the doubling effect of functional superposition; They are not value - neutral tools in the ethical norms of edu? cation, bearing the ethical norms, moral constraints and other value loads. In the post - rural society, the school moral education should be coupled with the cultivation of the public, and the coordinated development needs to solve the three obstacles, that is, to break through the scale imbalance of “Group” and “Self”, the deviation of “Same” and “Different”, and the one - dimensional diffi? culty of discourse power. On the basis of analyzing the problems, this paper puts forward some solutions, such as from polarization of “Group” and“Self” to“Scale balance”, from“Mastery of agreement” to“Respect for heterogeneity”, from“Encirclement and suppres? sion” to“Coexistence”, finally, the author expects that the moral education and the cultivation of public man will co - build and pro? duce the coupling effect of “1 + 1 > 2”.