With the rapid development of educational informationization, a new emerging teaching mode—flipped classroom, has impacted college English teaching. For its own merits and demerits, this paper tries to rationalize how to flip the classroom from the perspective of students, teachers, campus environment and evaluation, so as to improve the effectiveness of flipped classroom in college English teaching. It not only gives a different voice to the heatedly discussed issue, but also provides reference for the teaching mode in the college English teaching.