With the continuous development of speech recognition technology, automatic subtitle generation has gradually attracted people's attention. However, the level of short videos is uneven, and cultural teaching is also one-sided, irregular, and lacking systematicness. Since the media era, it is possible to apply the short video subtitle generation algorithm to international Chinese education and teaching. However, Chinese teachers should pay attention to some possible problems in self-media videos and adopt appropriate teaching strategies. This paper mainly discusses the development of international Chinese education and teaching under the new media environment, and discusses the characteristics, advantages, and disadvantages of international Chinese education and teaching under the new media environment, as well as the existing problems. Short video subtitle generation algorithm provides a new way for international Chinese education and teaching, enhances the vitality of education, and expands educational channels.