Current aircraft virtual maintenance process models suffer solidification, do not fully consider the relationship between complex maintenance behaviors, and cannot meet the trainees' diverse training needs. Given the complexity of aircraft systems,
the not standard and random operation of trainees, we construct a priority constraint matrix according to the priority constraint relationship among maintenance assembly sequences, and then define the priority constraint timed colored Petri net (TCPN) model. On the basis of systematic examination of the maintenance entities and their maintenance operations, we propose a virtual maintenance entity operational meta-model and a process model based on the meta-model fusion, and describe the implementation method of the dynamic virtual maintenance process based on priority constraint TCPN. Finally, an example of a random disassembly process of a refueling valve of an A320 aircraft is modeled and simulated to verify the model.