With the in-depth development of globalization, second language learners have become an important bridge to promote understanding and cooperation between different cultures. Faced with the impact and differences of foreign cultures, many language learners are faced with cultural misunderstandings, social difficulties and other challenges in cross-cultural communication. South Korea and China belong to the same East Asian cultural circle, and the cultural differences are relatively small. Chinese learners tend to ignore cross-cultural communication problems, which will bring communication obstacles. Therefore, it is of great importance to improve the cross-cultural communication ability of Korean Chinese learners. Through the mixed research method and the questionnaire survey method in the quantitative research, this paper has an in-depth understanding of the current situation of the cross-cultural communicative competence of Chinese learners in B University in BUSAN South Korea, and the specific reasons affecting the improvement of their competence have been learned through the interview method in the qualitative research. It is hoped that through the research in this paper, It can provide theoretical support and practical guidance for improving the cross-cultural adaptability of Korean Chinese learners and promoting the international cultural exchange and cooperation between Korea and China.