In order to achieve a multi-level layered structure similar to shell mother of pearl， a simulation model was established by using Abaqus software to study the performance of ultra-high ductility concrete （UHDC） after layered bionic assembly， analyze the development of crack， bearing capacity， deformation capacity， stress distribution and slip between layers. The parameter analysis was carried out. The results show that by designing the size of separation/connection， the main cracks of the bio-inspired stacked beam can be deflected and bifurcated， and more cracks can be inspired， but its deformation may no longer agree with the assumption of flat section. Compared to the cast beam， the ductility characteristics of bio-inspired stacked beam are more obvious， and the energy consumption capacity and toughness are significantly improved.