A burst loss recovery mechanism based on forward frror correction was proposed to reduce burst loss probability in optical burst switching networks.A new lowdensity paritycheck code was designed to encode and decode bursts online.In the ingress node,encoder generated redundant bursts by encoding information bursts,and in egress node,decoding algorithm was used for recovering lost bursts.For redundant bursts contended with information bursts for wavelength resource and that may result in large information bursts loss,extraoffset time was added for information burst.The performance of different burst loss recovery mechanism was investigated by OPNET simulation software,the results show that the burst loss recovery mechanism can reduce burst loss probability more efficiently compared with pairtycheck codes.Therefore,the mechanism is provided with good capability of burst loss recovery.