Abstract: Nowadays,the WDM network can not hold more than tens of channels,and the broad-band network normally need support a lot of nodes.This paper,proposes a distribution method of the network channels based on the condition that the node number is bigger than the channel number.Some of the network properties are analyzed through mathematical method,based on the distrbution methed.This paper also find a new method to utilized the limited channel resource.Moreover,the optimal number of data slat is studied.