Economic globalization imposes substantial demands on China’s talents, necessitating the possession of international awareness, communication skills, and competitiveness. Ph.D. students, as highly educated individuals, play a pivotal role in developing cross-cultural communication skills and gaining international awareness. Not only must they grasp basic English vocabulary and grammar, but they must also apply their knowledge in practice to enhance competitiveness in their respective fields. However, the current English courses offered at universities fall short of meeting their needs. To address this issue, this study examines the English for International Academic Communication course for non-English major Ph.D. students at C University. Employing questionnaires, semi-structured interviews, and class observations, the research explores the teaching approach aimed at cultivating interdiscursive competence in high-level international talents. Additionally, it analyzes the effectiveness of interdiscursivity in English learning and investigates the enhancement of students’ interdiscursive competence. Ultimately, the study provides valuable suggestions for educational activities, better catering to the needs of Ph.D. students and preparing them to thrive in a globally interconnected world.