自然之债作为法律无强制执行力规定,只维护其履行效果,而只受当事人所负担的一般道德标准的衡量,但给付人不得提出请求来给付或返还的债务。本文通过探究自然之债制度的起源和表现和自然之债的概念、特征,以期获得对自然之债概念的一般性理解;通过对自然之债的分析与讨论,希望发现自然之债的效力和在现实生活中的执行力情况。 Natural debt as a law without enforcement provisions, only to maintain its effectiveness, but only by the parties to measure the general moral standards, but the payer may not make a request to pay or return of debt. This paper explores the origin and expression of the natural debt system and the concept and characteristics of natural debt in order to gain a general understanding of the concept of natural debt. Through the analysis and discussion of natural debt, we hope to discover the effectiveness of natural debt and Execution in real life.