Abstract: Battlefield airspace management and control can provide support for the reasonable and efficient use of airspace by various combat forces, and it is the prerequisite and foundation for the smoothly and orderly implementation of various combat operations. The current difficulty in implementing battlefield airspace management and control is fast, real-time, and efficient airspace conflict detection. Firstly, the basic principle and the encoding mode of GeoSOT-3D are introduced; then, the three-dimensional spatial entity expression model of airspace is constructed, and the airspace was rasterized; finally, the shortcomings of the traditional airspace conflict detection algorithm are analyzed, and a GeoSOT-3D-based airspace conflict detection algorithm is proposed. The sample of airspace conflict scenario is analyzed on the 3D grid platform, a new technical means and practical ideas for airspace conflict detection are provided.