Abstract: The main objects of economic contention in ancient times were land,population and money.The significant development and new changes in the societies of the Tang and Song Dynasties were the formation of a monetary society.Under this new situation,the contradictions caused by currency wereunprecedentedly numerous and widespread.Many of these contradictions intensified into disputes,riots and even rebellions,and the “currency struggle” increased sharply.This article first sorts out the relevant historical records and then classifies and comments on their nature.It is believed that these contradictions and struggles include not only monetary disputes among relatives and friends,ordinary people,the military,officials,and monarchs and ministers within the society of the Song Dynasty,but also battles among different regimes.In terms of its nature,there are not only the contradictions between employees and employers,but also the contradictions between the trustworthy and the untrustworthy within the credit community,as well as the struggles between plundering and anti-plundering among different regimes.The issue of “currency struggle” was not unique to the Song Dynasty,but its frequent occurrence and prominence were rare in ancient history.

Key words: Song Dynasty, monetary society, currency struggle, contradiction, nature