辽国建立之后,虽在政治和军事方面与宋朝相敌对,但在经济和文化上却对宋朝具有极强的依附性。通过对各地出土窖藏钱币的研究得知:北宋钱币数量居多,占窖藏总钱币数量的70%以上;唐代钱币次之,约占窖藏总钱币的20%;辽国钱币数量稀少,少则数枚,多则几十、数百枚。辽国虽然铸造代表本民族政权的货币,但宋钱和其他中原王朝钱币仍是其商品流通中发挥主要交换媒介职能的货币。为满足对于货币的不竭需求,辽国一方面颁布律令严禁铜钱资源外流,另一方面通过贸易往来等手段争取更多的铜钱流入。在同一货币纽带的绾连下,宋辽双方经济交往非常密切。 After the establishment of the Liao Dynasty, although hostile to the Song Dynasty in political and military terms, it was economically and culturally highly dependent on the Song Dynasty. Through the study of cellars unearthed in various places, it is found that the number of coins in the Northern Song Dynasty is the most, accounting for more than 70% of the total number of caves; the money in the Tang Dynasty is second, accounting for 20% of the total caves; the number of coins in Liao Dynasty is scarce, Pieces, as many as dozens, hundreds. Although the Liao Dynasty was casting money representing the national government, the Song and other Central Plains dynasties were still the currencies that played a major role as exchange media in the circulation of commodities. In order to meet the inexhaustible demand for money, on the one hand, the Liao Kingdom promulgated the law to prohibit the outflow of copper resources, on the other hand through trade and other means to win more money inflows. In the same monetary bond, the economic exchanges between the two sides are very close.