The invention belongs to the field of pressure-bearing sandwich plates, and particularly relates to a concave octagonal cubic lattice sandwich plate structure. Compared with the most common stiffenedplates in the field, under the action of the same static load, the deformation mode of the lattice sandwich plate structure is the same as that of the stiffened plates, but the deformation and the stress of an upper panel and a lower panel of the lattice sandwich plate structure are both smaller than those of the stiffened plates, and the rigidity of the lattice sandwich plate structure is superior to that of the stiffened plates with the same mass; under the action of an equivalent dynamic load, the displacement of the upper panel and the displacement of the lower panel of the lattice sandwich plate structure are both far smaller than the displacement of the stiffened plates, and meanwhile, the displacement of the lower panel of the lattice sandwich plate structure is also smaller than the displacement of the upper panel of the lattice sandwich plate structure; and under the condition of an initial speed load that the stiffened plates are subjected to plastic deformation, the deformation of the lattice sandwich plate structure is still kept within an elastic range, and the anti-impact mechanical performance of the lattice sandwich plate structure is far superior to that of the stiffened plates with the same mass.