A fundamental issue in optical burst switching(OBS) networks is to solve the burst contention for the core node.In this paper,a novel priority-based contention solution strategy for OBS networks is proposed.When the contention occurs,the burst priority is considered firstly,and then the burst segmentation method is used for the low priority bursts in this strategy.Ensuring the integrity of high priority bursts,part of the segmented bursts can be transmitted to the destination node via combining wavelength conversion and optical buffer method.Simulation results show that the proposed scheme not only ensures the integrity of high priority bursts,but also reduces the packet loss rate of the low priority bursts maximally,so that it can support good quality of service(QoS) for the network. A fundamental issue in optical burst switching (OBS) networks is to solve the burst contention for the core node. In this paper, a novel priority-based contention solution strategy for OBS networks is proposed. When the contention occurs, the burst priority is considered first, and then the burst segmentation method is used for the low priority bursts in this strategy. Ensuring the integrity of high priority bursts, part of the segmented bursts can be transmitted to the destination node via combining wavelength conversion and optical buffer method. Simulation results show that the proposed scheme not only ensures the integrity of high priority bursts, but also reduces the packet loss rate of the low priority bursts maximally, so that it can support good quality of service (QoS) for the network.