《左传》作为春秋时期的重要文献典籍,真实生动的反应了春秋时期的社会状况。而通过对《左传》中所记信德之事的研究,我们可以了解到:在春秋时期,信德不断被人们所认识、发掘,不仅成为邦国结盟的行为规范,也逐渐成为国家施政于民的重要的道德手段,同时也是个人尤其是臣子所恪守的道德操守,从而信德渐渐地成为了协调社会关系的重要道德规范之一。 “Zuo Zhuan”, as an important document in the Spring and Autumn Period, truly and vividly reflects the social conditions in the Spring and Autumn Period. Through the study of the faith recorded in “Zuo Zhuan”, we can understand that in the Spring and Autumn Period, faith was constantly recognized and explored by people, which not only became the norm of alliance between the states but also gradually became Is an important ethical tool, and is also an ethic strictly followed by individuals and especially by courtiers. As a result, faith has gradually become one of the important ethical codes for coordinating social relations.