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Aiming at the problem of low efficiency and large waste of resources in the practical training of a complex equipment, a virtual training and assessment system were developed by using computer technology. High accuracy 3D models were developed by usingmodling software, There were human-computer interaction compilated by importing interactivon software after assemblicationg, rendering and reducesing the number of polygons. Motion designing, collision testing and interference limination were solved; and training and assessment system was developed, operation times, correct and false rate, synergy effect were considered. Networking trainning was developed by using second development, and collabortative training were developed. The training and assessment system would be used to training operation an equipment without using the real equipment, training efficiency was improved and resources were reduced. Virtual training and assessment system for an equipment was developed by using virtual technology, Others virtual training and assessment would be developed after modifying 3D models, The method contains hihg technical content and good practicability, high application value would be acquired after the new equipment was received.