With the in-depth advancement of digitalization in education, the ecology of international Chinese language education has undergone significant changes, and multimodal teaching has become the main mode of international Chinese language education. This paper discusses the multimodal teaching mode of international Chinese language education, and gives a practical path for the improvement of learners’ comprehensive Chinese language skills. It then conducts a comparative study of international students in a university’s School of International Education by means of a teaching experiment, and realizes the quantitative assessment of the improvement of students’ comprehensive Chinese language skills by means of statistical analysis and regression analysis. The results show that the improvement of comprehensive Chinese language skills of the experimental students is significantly better than that of the control students, and with the advancement of teaching, the level of variability of the two classes increases from 5% to 1%, and the improvement of comprehensive Chinese language skills of the experimental students also increases from 6.76% to 12.18%, which verifies the facilitating effect of the multimodal teaching mode on the improvement of comprehensive Chinese language skills. Among them, the explanatory degree of the multimodal teaching mode on the improvement of Chinese comprehensive skills is 33.8%.