Abstract: Strengthening the country with talents is the first strategy to achieve national prosperity, the scientific research group, meanwhile, is the front-lines of talent training to serve the national strategy and promote the construction of Double First-class University. The international training of postgraduates is based on the scientific research group and is one of the most effective ways to improve the competitiveness of China’s scientific and technological talents. This paper studies the international cooperation and joint training mode for postgraduates based on mentor scientific research teams through specific cases. The results show that the model is conducive to educate people throughout the whole process, to cultivate innovation-oriented talents of both ability and integrity, both Chinese mood and international vision. Based on this, a new platform for high-level international talent training with native characteristics is built. This study can provide experience and reference which can deepen and reform the postgraduate’s training mode.