Method and device for optimizing performance of optical communication network

The present invention relates to the technical field of networks, and particularly relates to a method and device for optimizing the performance of an optical communication network. The method comprises: collecting network state information about an optical communication network; determining a target non-linear noise coefficient enhancement factor α corresponding to the optical communication network according to the network state information; obtaining a plurality of sets of target NFs and target L eff s corresponding to the combination of a plurality of sets of pump powers under the target α; performing computation to obtain a plurality of equivalent optical signal to noise ratios ( OSNR eq opt ) of the optical communication network by using the target α, the target NFs and the target L eff s; and selecting the maximum OSNR eq opt from the OSNR eq opt s, and adjusting the at least one multi-step Raman fibre amplifier according to the power value of the combination of pump powers corresponding to the maximum OSNR eq opt . By means of the solution provided in the present invention, BER satisfies the requirement condition after a signal has been transmitted through a link, and additionally it does not require the total pump power to be maximum when BER satisfies the requirement condition, thus avoiding the negative effect that the Raman fibre amplifier application has on system security.