克拉申语言输入理论对外语教学具有很好的指导作用,给大学英语第二课堂的开展提供了有力的理论指导。本文以克拉申语言输入理论为依托,分析大学英语第二课堂开展的可行性和有效性,介绍丰富多彩的大学英语第二课堂式。第二课堂突破了第一课堂教学的局限性,形式上更加灵活,内容上更加丰富多彩,更加能够调动学生学习的积极性和主动性,成为加强学生英语应用能力的重要辅助手段。衡水学院在大学英语教学改革过程中,充分结合第一课堂和第 Krashen’s theory of language input has a good guiding function for foreign language teaching, which provides powerful theoretical guidance for the second class of college English. Based on Krashen’s theory of language input, this article analyzes the feasibility and effectiveness of the second class of college English and introduces the second class of rich and colorful college English. The second class has broken through the limitations of first-class teaching. It is more flexible in form, more rich and colorful in content, and more able to mobilize the enthusiasm and initiative of students in learning. It has become an important auxiliary to strengthen students’ English proficiency. Hengshui College in the process of college English teaching reform, full integration of the first classroom and the first