Aiming at the problem that the existing 2D situation display can not meet the needs of modern warfare, a design scheme of real-time 3D situation display system based on Cesium is proposed. This paper briefly introduces the characteristics and advantages of Cesium system, constructs the architecture of Cesium-based situation display system, and analyzes in detail the key technologies such as comprehensive integration and real-time data-driven. The results show that the scheme is simple and feasible, and can realize real-time 3D situation display.