Based on burst clone,a burst encoding mechanism based on preemption is proposed to reduce burst loss rate.In the source edge nodes,some information data bursts(DBs) are encoded and a redundant DB is produced by the parity check code.In the core nodes,an information DB can preempt a redundant DB to reduce the contention from redundant DBs.And the burst loss rate of the information DB is reduced.In the destination edge nodes,the loss information DB in the core nodes can be recovered by the redundant DB.The proposed burst encoding mechanism is low computational complexity and efficiently reduces burst loss rate.