The invention relates to a teaching feedback system based on knowledge point analysis. The teaching feedback system comprises a paper-reading terminal, a paper-marking terminal and a cloud database which are communicated with each other. The beneficial effects of the invention are that the system provides selected knowledge points for a teacher and is suitable for students who are different in learning process and learning level, so that paper-marking reports are more targeted and counting of knowledge points with wrong answers is more accurate; through adoption of a commentary module, the teacher can select commentaries for manually read questions with wrong answers and offer personalized suggestions to different students, so the teacher provides paper-marking results in a more student-friendly manner; and a commentary feedback module is adopted to provide subjective opinions for the teacher to collect the learning state and progress of the students and also help the teacher to more accurately and effectively know knowledge points that the students tend to give wrong answers.