<p>Based on the two basic configurations of hexagonal and auxetic shapes, the crack extension law of laminated porous structures under three-point bending is investigated using experimental tests and finite element simulations. The effects of the layup mode and the number of cytosolic layers on the failure modes, strength, toughness, and deformation of the laminated porous structures are discussed. The results show that the strength and toughness of the models are enhanced with the increase of the number of laminated layers, except for the hexagonal ± 45° alternating symmetric layup. The internal angle α has a more significant effect on the auxetic model and a minor impact on the hexagonal model. The increase of the number of laminated layers changes the force situation of the rods in the structure so that the rods above the prefabricated cracks are subjected to uniform force. The failure of the rods with the smallest angle to the horizontal direction is suppressed, and the crack is not easy to expand, and the toughness of the model is enhanced. The deformation of the interlayer connection region is more minor compared to the interlayer unconnected region, which indicates that the laminated structure inhibits the deformation of the structure.</p>