薇拉·凯瑟是美国文学史上第一位潜心描述美国拓荒运动的伟大女作家。她以内布拉斯加为背景,创作了《啊,拓荒者!》、《云雀之歌》和《我的安东妮亚》等作品。这三部作品具有相同的背景、共同的主题。本文大胆地把这三部小说归为三部曲,把它们看成是一个内布拉斯加女拓荒者人生经历的三个不同的阶段。这三部小说也标志着美国拓荒运动的开端、顶峰和结束。 Vera Cather is the first great writer in the history of American literature who describes America’s pioneering movement with great concentration. With Nebraska as her background, she creates “Ah, Pioneers!”, “Lark Songs” and “My Antonia”. These three works have the same background and common themes. This article boldly divides the three novels into trilogy and treats them as three different stages in the life experience of a female pioneer in Nebraska. These three novels also mark the beginning, the pinnacle and the end of the U.S. pioneering movement.