Purpose <p>To enhance the energy absorption capacity, stiffness, and stability of vibration isolation metamaterial structures, this paper introduces a mechanical metamaterial vibration isolation design that incorporates carbon fibers and concave features, building upon traditional honeycomb structures. This design is affixed to the transmission path between mechanical equipment connections to facilitate energy dissipation.</p> Methods <p>Firstly, a theoretical model of the isolation structure is established, and the dynamic equation of the isolation structure is established through the theoretical model. Then, based on the finite element method, the mechanical properties of the mechanical metamaterial element are analyzed and quasi-static compression tests are conducted. Finally, the hysteresis characteristics are considered to analyze the influence of geometric parameters on energy absorption.</p> Results <p>Based on theoretical analysis and simulation results, when filled with carbon fiber, the specific energy absorption of the concave structure increased by 45.7% compared to the traditional honeycomb structure; The parameters of vibration isolation model 1 are the optimal parameters, and compared with other models, the energy absorption index has increased by 18.9%.</p> Conclusion <p>This confirms that the vibration isolation structure of embedded carbon fiber internal concave mechanical metamaterials exhibits superior energy absorption capabilities and enhanced stability, thereby offering a novel approach for the design of mechanical metamaterials aimed at vibration reduction and energy absorption.</p>