Abstract: Aiming at the problems of high cost, low sense of participation, incompleteness and high security risks, a virtual-reality complementary port practice platform is developed. Based on virtual simulation technology, this paper discusses the system design, key technologies, practice process and assessment method of this platform. This platform highly restores the crane structure and typical port handling technology, and proposes the virtual practice method with the combination of real scenes and virtual scenes. The experimental teaching of virtual production practice in the university during the epidemic period shows that the virtual-reality complementary port practice platform has great advantages in the cognition of crane mechanisms and the details of port loading and unloading technology, which can also mobilize the enthusiasm of students, increase their learning efficiency, and improve their internship satisfaction significantly.