：文章针对目前图书影响力评价研究的不全面性，从引文内容的角度对图书在其施引文献中的被引用动机情况进行探究分析。首先，基于现有研究归纳出三种图书被引动机分类标准——使用、比较和背景引用；其次，以五个学科领域中文图书为例，获取其在施引文献中的引文内容信息，并标注引文的动机标签；最后，探究图书的被引动机分布及其与引用位置、引用长度的关系。实证分析结果显示，图书被引动机中"使用"占比较大。同时，引用动机与引用位置存在显著相关性，而与引用长度无明显相关性。此外，不同学科领域图书在施引文献中的引用动机存在差异。

In view of the incompleteness of the current research on the evaluation of book influence, this paper explores and analyses the motivation of books being cited in the citation literature from the perspective of citation content. Firstly, based on the existing research, three classification criteria of citation motivation are summarized: use, comparison and background citation. Then, the citation content information of Chinese books in the citation literature of five disciplines was obtained, and the motivation label of the citation was marked. Finally, the distribution of book cited motivation and its relationship with citation location and length was analyzed. Empirical analysis shows that the proportion of "use" in book-citing motivation is relatively large. At the same time, there is a significant correlation between citation motivation and citation location, but no significant correlation with citation length. In addition, there are differences in the motives of citation of books in different disciplines.