Critical peer feedback is regarded as an effective means to facilitate quality of peer feedback in TEFL class. In this study, a comparative study was conducted between two experimental classes (Nc1=31, Nc2=31) to study Chinese undergraduate perception and efficiency of critical peer feedback in oral presentation. By a mixed study, the 5-scale Likert questionnaires and semi-structured interviews (N=8) were implemented at the setting. The study finds that students have strong confidence that critical peer feedback can improve their quality of oral presentation and the quality of peer feedback. And the quality of oral presentation and quality of peer feedback are facilitated in this comparative study. However, the students still perceive that they are inefficient of the skills of oral presentation like eye contact, PPT design and language organization, and critical peer feedback like critical questions and rubrics. In addition, this implies that the skill training of oral presentation and critical peer feedback is the prerequisite for the novice users in TEFL class which can be facilitated by training, and critical peer feedback focuses on the critical content of peer feedback by critical thinking.