In order to effectively solve the problem of time delay degradation caused by the sleep technology in the Optical Network Unit（ONU）of Time and Wavelength Division Multiplexed Passive Optical Network（TWDM-PON）

agreen dynamic bandwidth allocation algorithm based on traffic-aware is proposed.By combining energy saving mechanisms such as the receivers and transmitters sleep independently and sending sleep control signaling one by one and mixed sleep

the sleep time of transceivers are extended as long as possible

so as to reduce the energy consumption of ONU.In addition

by sensing the traffic

the bandwidth demand of services in the short future can be predicted.Therefore

the polling cycle length are dynamically adjusted according to the bandwidth demand of delay sensitive services

so as to meet the requirement of service quality and minimize the delay of expedited forwarding service at the same time.Simulation results show that the proposed algorithm can effectively reduce the energy consumption at the ONU in TWDM-PON under the premise of ensuring the quality of service.