Abstract：In modern Chinese society, the relationship between mother-in-law and daughter-in-law has achieved fundamental transformation, from mothers-in-law relatively strong to equality, even in some families daughters-in-law are in a strong place. The transformation of mother-in-law and daughter-in-law relationship is inseparable from the transformation of Chinese society, and the ethics transformation is an important factor. At present, filial piety ethics seems to decline; traditional ethical community has turned to modern individual ethics, and the capital ethics also constantly impacts the traditional relationship between mother-in-law and daughter-in-law, all of which will lead to the end of the traditional relationship.This transformation is progressive as a whole, but there are still some imbalances. The “war” continues.To solve this problem, we need to rebuild new mother-in-law and daughter-in-law inter-relationship ethics which requires both of them to understand, tolerate, respect each other, and bear the sense of responsibility.

Keyword：the relationship between mother-in-law and daughter-in-law;social transformation;filial piety ethics;ethical transformation;