Scheduling algorithms make a great impact on the performance and implementation complexity of switch architecture.Traditional maximal matching (MM) algorithm cannot get a proper balance between these two factors

so in this paper we propose a new kind of Extended Maximal Matching (EMM) algorithm.By using different weight parameters

EMM algorithm can derive different kinds of algorithms.We prove that any EMM(2) algorithm with data speedup of 2 can deliver 100% throughput

and show it can also achieve almost the same delay performance as ideal Output Queueing (OQ).Furthermore

under the situation of non-speedup

through simulation we show EMM algorithms

with more than two weight parameters

can greatly increase the throughput performance of MM algorithm.