Background <p>The quasi-zero stiffness metastructures have excellent low-frequency vibration isolation performance. However, due to its unique working principle, it can only effectively isolate objects subjected to specific loads and is greatly limited in many application scenarios.</p> Method <p>A quasi-zero-stiffness metastructure with a distinct structural configuration from previous designs was proposed, and the optimization of its quasi-zero-stiffness characteristics was achieved using multi-objective optimization theory. The mechanical properties and vibration isolation performance are comprehensively analyzed through theoretical analysis, finite element simulation, and experimental testing. The structure customization theory and design methodology for multi-stage quasi-zero-stiffness systems are summarized and validated via finite element simulations.</p> Result <p>It has been proved that the proposed quasi-zero stiffness structure has excellent low-frequency vibration isolation performance. The proposed structural customization theory can precisely customize a quasi-zero stiffness lattice with specific loads based on structural parameters. The multi-level quasi-zero stiffness design method utilizes various materials and combinations of different lattice layers to obtain a quasi-zero stiffness system with multiple vibration isolation platforms.</p> Conclusion <p>The proposed double-cosine beam quasi-zero stiffness vibration isolation structure in this paper provides certain supplementation to the design concept of metastructures. The customized structure idea enhances the accuracy of its vibration isolation. The design of multi-level quasi-zero stiffness vibration isolation systems strengthens the practicability of the quasi-zero stiffness system.</p>