CET-4 and CET-6 have attracted the attention of universities and relevant education authorities all over the country, and aroused the enthusiasm of teachers and students. A large number of statistical data and experimental materials of validity research prove that CET-4 and CET-6 have high reliability and validity. They meet the quality requirements of large-scale standardized examinations and can reflect the English level of college students in China according to the requirements of the syllabus. Therefore, they have effectively promoted the implementation of the syllabus and the improvement of college English teaching in China.