Abstract: An multi-topology routing generation algorithm based on immune mechanism was proposed due to the fact that the algorithm in existence causes unreasonable usage of storage resource and maladjustment of multi-faults recovery．Aiming at adapting for fault of high probability,according to the principle of the key part matching instead of corresponding completely between epitope and paratope in the immune mechanism,sub-topology generation is treated as antibody generation in immune system in the proposed algorithm,thus the network invulnerability under complexion of multi-faults is enhanced．And the question of optimization is solved by using artificial immune algorithm．The experimental result shows the network invulnerability under multi-faults is improved．

Key words: Network invulnerability,Multi-faults recovery,Immune mechanism,Multi-topology routing