Based on I Have A Dream written by Martin Luther King,Jr,this paper analyses the rhetorical features in public speeches from sentence variety,and specific rhetorical device.

• 路德.；金的著名演讲IH ave a Dream为例；从词语的选择与使用、句式的变化与特点、具体修辞手法的运用三个方面分析了演讲文体的修辞风格。