To classify IP traffic accurately and provide a reasonable differentiat ed protection according to traffic priority,a network protection strategy with traffic aware classification (PSTAC) is proposed.It defines information significance (IS) to evaluate the features of traffic.Combined with Naive Bayesi an theory,a traffic priority model is established.Meanwhile,a targeted protection against network failure is provide d according to the quality of service (QoS) parameters of different priority traffics.The simulation results show that the proposed str ategy can achieve accurate traffic classification,and get higher resource utilization rate and lower blocking rate than traditional differentiated protection algorithm.