In a hybrid optoelectronic data center,an electronic switch can switc h packets in small traffic flow flexibly and efficiently,but cannot effectively transmit those in large traffic with long duration.In contrast,optical routers are just the opposite.Therefore,in the hybrid optoelectronic data center networks based on arrayed waveguide grating router (AWGR),a hierarchical and classified traffic schedu ling strategy using active queue detection is proposed to achieve effective scheduling of both large and small traffic by a combination of electronic switching networks and optical wavelength paths. According to the traffic model of data centers,simulation experiments are desig ned,in which the average delay and throughput of each architecture under different traffic models are analyzed. Numerical results show that:comparing with the Fat-tree,C-Through structures a nd the conve ntional tree structures with a bandwidth convergence ratio of 1∶1,the throughpu t of the AWGR s tructures increases at least 19.43% and the delay reduces at least 45.73% under random traffic model.Under point-to-point traffic model,as K increases from 1to 4,the AWGR s tructures compared with the other three structures have t he lowest throughput drop and delay increase of 2.85% and 46.98% respectively,Our scheme can effectively improve the performance of throughput and delay in a datacenter.