Abstract: In this paper, based on studying the routing algorithm and re-router model of MPLS Traffic Engineering，a new routing model S-DQRA is proposed. It not only considers the practical requirements of the traffic when the LSP is initially established, but also guarantees reasonable resource utilization. Moreover, for the warrant of more reliable service, a novel re-router model S-DQRRA is proposed based on the S-DQRA model. It works when any invalidation occurs, and switches the traffic from the work path to the backup path. Finally, extensive simulation using NS-2 is conducted to verify the effectiveness of these two models. Compared with the classical models, the experimental results indicate that the models have the favorable working performance.