：为了给全民阅读背景下公共图书馆开展阅读推广提供有效的途径，文章通过实地调研、电话访谈等方式对美国公共图书馆开展的两种跨年龄阅读模式（青少年志愿者-儿童、老年人志愿者-儿童）进行了介绍和对比分析。两种模式都体现出在快乐中分享阅读和注重满足社区需求的哲学理念，呈现出提供家庭之外一对一互动阅读、侧重儿童早期阅读素养发展、给予参与者充分的自主权、注重对志愿者进行培训的特点。同时，志愿者不足是两种模式存在的共同障碍，而有序的组织和规划、让阅读变得有趣、拥有致力于项目的志愿者则是项目成功的关键。两种模式的不同主要表现在志愿者参与原因、是否需要审查、合作对象以及活动效果方面。

In order to provide an effective way of reading promotion for public libraries in the context of civil reading, this paper introduced and compared two kinds of cross-age reading modes (teenager volunteers-children, older adult volunteers-children) of American public libraries through field research and telephone interviews. Both modes reflect the philosophy of sharing reading in happiness and focusing on meeting the needs of the community and present the characters of providing one-to-one interactive reading outside family, focusing on early childhood reading literacy development, giving participants full autonomy and focusing on training volunteers. Meanwhile, lacking of volunteers is a common obstacle to both modes, and orderly organization and planning, making reading interesting, and having volunteers dedicated to programs are key to the success. The differences between the two modes are mainly manifested in the reasons for volunteer participation, the need for review, the partners and the effect.