Preparation method of crossed-grid oriented light board

The invention discloses a preparation method of a crossed-grid oriented light board. The preparation method comprises the following steps of (1) longitudinal cutting, wherein a eucalyptus veneer is cut into veneer strips; (2) gluing, wherein an adhesive, the veneer strips and a modified adhesive are weighed, and the veneer strips are coated with the modified adhesive; (3) laying, wherein a whole eucalyptus veneer is used as a lower layer, the double-side glued veneer strips are arranged on the lower layer at equal intervals in parallel from left to right to serve as a layer I, the double-sideglued veneer strips are arranged at equal intervals in parallel from front to back on the layer I to serve as a layer II, the veneer strips continue to be arranged in the orthogonal mode, a total layer of the veneer strips arranged in the orthogonal mode serves as a middle layer, finally a whole eucalyptus veneer is placed on the middle layer to serve as an upper layer, and a plate blank is obtained; and (4) hot pressing