In order to accurately record the classroom interaction, the author took example by classroom observation method designed by Wu kangning。 The objects of observation are teachers and students of six classes in Grade one in the Moudao middle school。 The Grade one has 6 classes and a total of 480 students。 The number of students and level of students of each class are nearly equal。 The author listened 30 English classes by random and recorded the number of interaction behavior between teachers and students。 In the process of the lecture, the author did a lecture notes and made a chart about the frequency of interactions between students and teachers of Grade one in English class。