Focusing on the energy efficiency optimization of network traffic transmission, a Dynamic Weight of Weight Fair Queue algorithm (DW_WFQ) was proposed. In this algorithm, weights for various types of flows were dynamically allocated based on Weight Fair Queue (WFQ) algorithm, and service rates for traffic flows were assigned in a more flexible way. Then the energy consumption model of the scheduling algorithm was derived by combining with efficiency function of continuous flow speed scaling model, and the optimization of energy efficiency was carried out. At last, simulation test and comparison on DW_WFQ, First Come First Server (FCFS) and WFQ were given using Matlab. The simulation results show that the proposed traffic scheduling algorithm can effectively reduce system energy consumption, and meet the Quality of Service (QoS) requirement at the same time.