Evaluation is an important component in teaching and teaching also cannot leave evaluation. However, summative assessment has taken dominant place in college English in our country for a long time. It emphasizes students’ scores excessively, which bruises students’ learning initiative. Therefore, formative assessment which emphasizes learning itself and learning process has been paid more and more attention from scholars and teachers. This research tries to discuss formative assessment from these aspects such as the definition of formative assessment, the instruments of formative assessment, the modes of formative assessment, the theoretical bases of formative assessment and so on. This study also discusses the application of formative assessment in College English Teaching to explore its feasibility and effectiveness in College English Teaching. 评论 is an important component in teaching and teaching also can not leave evaluation. However, summative assessment has taken dominant place in college English in our country for a long time. It emphasizes students ’scores excessively, which bruises students’ learning initiative. Therefore, formative assessment which emphasizes learning itself and learning process has been paid more and more attention from scholars and teachers. This research tries to discuss formative assessment from these aspects such as the definition of formative assessment, the instruments of formative assessment, the modes of formative assessment, the theoretical bases of formative assessment and so on. This study also discusses the application of formative assessment in College English Teaching to explore its feasibility and effectiveness in College English Teaching.