Abstract: The effectiveness of classroom teaching is the main channel for improving the quality of school teaching, and the improvement of classroom teaching effectiveness depends to some extent on the form of classroom teaching interaction. In the new era, the“positive expression”classroom interaction method has become one of the important forms of teacher-student interaction in the classroom and is receiving increasing attention.“Positive expression”classroom interaction can significantly enhance the communication between teachers and students, improve the“head rate”of students, improve the quality of classroom interaction, and promote the optimization of teaching results. The research group found that the current classroom interaction in vocational colleges exist in a single form, poor results and communication problems. Therefore, we should innovate teaching methods, strengthen“positive expression”practice, pay attention to classroom interaction, build“positive expression”atmosphere, strengthen in-class development, enhance“positive expression”ability; Establish an evaluation system to encourage“positive expression”behavior.

Key words: New era, Vocational colleges, Teachers and students in classroom interaction, “Positive expression”, Effectiveness improvement, Instructional mode