Abstract: An emergency management workflow strategy was constructed for altitude simulation testing, and a Petri net model of the strategy was modeled. The model mainly comprises an urgency stop program and a crisis stop program. The urgency stop program is aimed to ensure safety of the tested engine and the testing facilities, simultaneously, is got attention to quickly stop, so it is basically composed of some stages in series. But the crisis stop program is targeted for a quick response, therefore, its various stages is principally in parallel. By analyzing the model, it was demonstrated that the model is reachable, sound, with free choice, well-structure, and S-coverable characteristics. According to the Petri net model, an emergency management for an aero-engine in altitude simulation testing was trained, and the response time was obtained in each stage. Key stages that effect the response time of emergency management were found in the crisis stop program of emergency management operation by analyzing the time data. In the follow, it was found that maximum benefit come from a compromise between ensuring safety of tested engine, testing facilities and the response time according to emergency event level in the urgency stop program. Modified emergency program and training effectively reduced the emergency response time in the key stage.