With the enhancement of China's comprehensive national strength and the spread of Chinese fever all over the world, more and more people are learning Chinese. Neologisms are a mirror of the development of contemporary Chinese society, which can directly reflect the most authentic Chinese language. The study of new words will help Korean students to understand contemporary China and improve their Chinese level. It is very important for Korean students to learn new words better through the acquisition of new words. After reading the literature, this paper finds that it is necessary for Korean students to learn new words, the current situation of their strong demand for new words and the existing problems in the teaching of new words in Chinese as a foreign language, which requires improvement in the acquisition of new words for Korean students. By using the questionnaire survey, this paper investigates the acquisition quantity, acquisition method and teaching of new words by Korean students. In terms of acquisition quantity, although the acquisition quantity of new words by Korean students has reached 50%, the proportion of new words that Korean students can master and use is very small; the acquisition quantity of new words by foreign students at primary and intermediate Chinese level is less than that of foreign students at advanced Chinese level, and the number of new words acquired by foreign students with long Chinese learning time is more. At present, the acquisition methods of new words for Korean students are mainly network, teachers, friends and dictionaries. With the improvement of Chinese level and the increase of Chinese learning time, the phenomenon of using network to acquire new words is more significant. In terms of the acquisition types of new words, Korean students have the best acquisition of life new words. The main way of acquiring new words for Korean students is network coincidence, which fully shows that the main and common way of acquiring new words for Korean students is network. In the aspect of teaching Chinese as a foreign language, the number of new words in the teaching materials is limited, and the teacher's teaching of new words is relatively scarce, so the number of new words acquired by foreign students through teaching methods is very limited, which can not meet the strong demand of Korean students for new words, so it is necessary to increase the strength of new words teaching.