The realtime rendering of 3D of the Jiaohe Ruins is a key method to broadcast charisma of cultural heritage. With the rapid developing of the 3D scanning technology in data acquiring, the quantity of gemetry and texture data of the heritage buildings grows geometrically. The data management becomes a key issue. This paper introduces the block technology of data, spatial index and accelerating strategies in real time rendering the Jiaohe Ruins 3D model. The 3D data of Jiaohe Ruins have be managed by these methods ,and achieved realtime efficiently browsing in the threedimensional system.