Critical thinking is one of the core objectives of talent training in higher education. Meanwhile, the cultivation of critical thinking skills in foreign language teaching has become more and more urgent, and it has also been written into the national standards for the training of foreign language talents. A good critical thinking includes both a skill dimension (Critical Thinking Skills) and a disposition dimension (Critical Thinking Dispositions). Critical Thinking Skills include interpretation, analysis, evaluation, inference, explanation and self-regulation. This study intends to explore the current situation of the critical thinking skills of undergraduates in foreign language majors (English and Japanese) in a Normal University, and then attempts to find out the similarities and differences in critical thinking skills between English majors and Japanese majors after years of study at college. The results show that a clear difference exists between English majors and Japanese majors in overall critical thinking skills. In particular, English majors are superior to Japanese majors. Another finding is that there are also differences between the two majors in the three core sub-skills of critical thinking skills, analysis, evaluation and inference.