Abstract: To investigate the failure mechanisms and bursting performance of double-layer reverse-arched bursting discs (DLRABDs) equipped with aid-bursting ring cones (ABRCs) under a high-pressure gas flow, a staged finite element simulation method (P-CEL) is proposed for DLRABDs. The bursting process splits into two stages: uniform pressure rise and non-uniform pressure rise. Direct pressurization simulates gas loads in the first stage, and the coupled Eulerian-Lagrangian (CEL) method captures the complex disturbed gas flow impacts on structures in the second stage. Bursting test data reproduce the full rupture process of DLRABDs with ABRCs, and the structural parameter effects on the bursting pressure and on the failure modes are analyzed. Standard tests reveal five failure stages for the first-layer disc: stable deformation, root collapse, top inversion, tip adhesion and cone-direction tearing. The second-layer disc presents four failure stages: root collapse, rapid top inversion and opening, cone-direction tearing and central secondary tearing. The two discs fail in mixed tensile-shear modes. Interlayer spacing mainly governs the second-layer failure mode: small spacing induces a strong impact-dynamic pressure coupling, while large spacing triggers gas-flow-dominated failure and barely changes the overall bursting pressure. ABRC cone tip height dominates the bursting performance; and taller tips shorten the tip adhesion stage and the lower bursting pressure.