The linkage digital sand table is to display the content to be displayed through the plane sand table, and then the wall displays the enlarged content to achieve the linkage effect. It can be said that the linkage sand table is a perfect combination of intelligent and dynamic performance on the sand table. Through the acousto-optic control equipment, sand table LED light, dynamic multimedia video, large screen and other sub equipment to achieve multi-functional synchronous linkage, and contrast with the demonstration of solid sand table, making the demonstration effect of sand table more vivid and vivid.