Timely and effective interactive feedback between teachers and students in classroom teaching is of great significance for the improvement of students’ learning motivation, classroom efficiency and teaching quality. This paper designs a smart classroom interactive teaching system based on ZigBee technology. And with the help of smart classroom interactive analysis coding system to test the application effect of interactive teaching system in business English classroom. After testing, the system in this paper can effectively improve the interactive flexibility of the smart classroom and shorten the time to open the system interface compared with the Flanders interactive analysis system based on event records and the classroom interactive teaching system based on 5G wireless communication, which can provide a guarantee for the learning and teaching efficiency of students and teachers. Taking the teaching of business English course as an example to test the system, the system in this paper helps to stimulate students’ interest in learning, promote students’ active learning, improve students’ classroom participation, and enhance students’ performance in business English. The study combined with students’ classroom performance data proves that the interactive teaching system based on communication technology can improve the effect of teacher-student interaction and feedback in the business English classroom.