Abstract: For engineering materials, bending is also a very common loading form besides the most basic forms of tension and compression. When used as engineering components, the foam metal may be subject to bending loads. On the basis of the mechanical relationship for porous materials under bending loads, the bending property of metal foams is further studied. The relation is acquired to calculate the bending strength of metal foams, and the material structure is expanded to cellular porous products. Based on these works, the practical application of the model theory is further explored in metal foams with different structures. The research results show that the mechanical relation from the octahedral model theory is not only suitable for calculating the bending strength of reticular metal foam products, but also for calculating the bending strength of cellular metal foam products, with good calculation effects.