Abstract: In recent years, student-centered flipped classroom has received great attention. It can greatly improve students' learning enthusiasm, increase the communication between students and teachers, and improve students' learning effect finally. Nevertheless, flipped classroom teaching puts forward higher requirements for both teachers and students: teachers need to have good professional quality and language expression ability; Students need to spend more time studying before class, and the learning effect is more dependent on their learning enthusiasm and initiative. In view of this, teachers should fully accept and make use of flipped classroom teaching on the basis of completely understanding that teachers' "teaching" is for students' "learning", and constantly improve their professional quality and comprehensive quality. When choosing the teaching content of flipped classroom, teachers should pay attention that it should not be too difficult or too easy, and only select part of the course content. In class, Teachers should check students' learning effect before class and ask them questions timely to avoid "Mr. Nanguo" problem.

Key words: Flipped classroom, Law of evidence, Traditional classroom