With the increasingly widespread application of medium and large unmanned aerial vehicle (UAV), their maintenance support and flight control capabilities are receiving growing attention from users. This article aims to address

the difficulties in practical maintenance of UAV and the low safety of flight control, taking the MQ-9 UAV as a case

and using the highly interactive and realistic Unity3D engine as a development tool, a visual simulation platform for

UAV is constructed to explore virtual maintenance and flight simulation methods. The results indicate that the interactive visualization feature of the simulation platform enables users to easily obtain the static and dynamic characteristics of the UAV maintenance system, timely provide geometric interference warnings between the maintenance personnel and the maintenance environment, verify the accuracy of maintenance and flight operations, and

achieve the goal of improving maintenance process cognition and flight operation skills.

unmanned aerial vehicles, Unity3D, virtual maintenance, flight simulation, process simulation