Abstract: Unity3D, as a powerful and good cross-platform 3D engine, has great application space in
building interactive virtual scenes, and it is of great practical significance for teaching. In view of this,
by analyzing the basic structure of the reducer, and on the basis of studying the method and key
technology of constructing three-dimensional interactive virtual scenes with Unity3D, taking some
kinds of reduces as examples, a reducer virtual disassembly and assembly experiment is constructed,
which can run based on many platforms. And APP which independently runs based on mobile
platform and no needs web support, is more convince and available, has achieved good teaching
effect in application, such as structure cognition, product disassembly, curriculum design, etc.

Key words: virtual reality, reducer disassembly and assembly experiment, mobile platform, Unity3D technology