Abstract: At present, 3D mine scene construction mainly adopts the method of creating basic models and then integrating the scene by using 3ds MAX, MAYA and other software, which is inefficient and difficult. In order to achieve simple and efficient 3D scene construction, based on Unity3D engine platform, a 3D mine digitizing editing system with real-time rendering, 3D roadway modeling, environment modeling, gas solving, scene roaming and other functions has been developed by embedding the basic model library with external interfaces, and embedding the algorithms of roadway construction, ventilation solution and gas spread. The practice shows that the scene constructed by the system has good effect and is widely used in mine cognition, self rescue and escape, emergency rescue, auxiliary decision-making and other simulation training exercises. It has strong practicability.