The Cooperative Principle not only plays an indispensable role in conversational implications but is also a good principle guiding human communication。 In interactive English teaching classroom, the four basic maxims have been greatly improved for Chinese English-learning students in the past decades。 However, these maxims have not been well developed and applied in the interactive lead-in part in English classroom。 Therefore, the thesis sums up three principles in interactive lead-in in English class on the basis of the Cooperation Principle。

(1)Quality principle

Quality principle is that the contents and activity design of lead-in should be closely related to the contents of the whole classroom teaching。 The contents of the lead-in must be able to better explain the material related to the content, which is beneficial for students to expand their horizons; and the activity design should also be suitable for teaching contents and not make contacts be remote from the subject。