The invention relates to a virtual reality based 3D training system. The system comprises a server and a scene database and a man-machine virtual interaction terminal which are in communication connection with the server; the scene database is used for storing interactive 3D scenes comprising multiple operation areas, and each operation area corresponds to a preset operation and interactive triggering ID; the man-machine virtual interaction terminal is used for loading the 3D scenes and interacting with a user, and when the operation performed by the user in the 3D scene operation areas is different from a preset operation in the operation areas, the interactive terminal sends the interactive triggering ID to the server; the server further comprises a first database, a second database andan association database.