The invention discloses a sand tray construction method based on tile terrain modeling and projection correction. The method comprises the steps that a digital elevation model and a digital orthophotomap of a region where a sand tray is about to be constructed are made; tile clipping is performed on the digital elevation model and the digital orthophoto map; image texture and fluctuating mesh processing is performed based on the digital elevation model and the digital orthophoto map after clipping; the processed tile-like digital elevation model and the processed digital orthophoto map are merged, and a sand tray spatial model is constructed; stereoprojection correction is performed on the sand tray spatial model according to preset viewpoint positions; four-screen projection display datais generated based on the corrected sand tray spatial model; and the four-screen projection display data is sent to four-screen projection equipment for display. Through the method, four projection screens are utilized to construct a digital sand tray display space, the display mode of the digital sand tray is greatly improved, and the view experience of the digital sand tray is greatly improved.