In order to improve the learning ability and efficiency of equipment knowledge in grass-roots units, an equipment interactive demonstration system based on Unity3D is proposed. Through the scene construction in Unity3D, the equipment introduction, interactive learning, operation training, maintenance training and other module architectures are formed, and combined with virtual reality, 3D simulation, video, text and other means, the dynamic interaction with the virtual equipment model is realized. The practice results show that the system can effectively improve the learning efficiency, deepen the sensory impression of learners, and improve the mastery of equipment.