This paper studies types and characteristics of the teacher classroom feedback through the examination of 18 classes of 9 middle school English teachers. We find 9 types of single feedback and 7 types of mixed feedback are used in middle school English classes. The characteristics of the teacher feedback include: repetition and positive feedback of the single feedback and “positive feedback + repetition” of the mixed feedback are the most frequently used in their respective types; the interaction between the teacher and the student is usually ended by the teacher feedback in separate IRF interactions; there exist differences of feedback use between different teachers in different types of classes; the teacher feedback focuses more on forms of language than on meanings of interaction.