This article begins with a simple introduction of concepts and current development of transmission network

then based on the summary of acknowledgement of intranet

it raises questions that need to be considered for optimizing network transmission

meanwhile

it describes the main characters of current network.Next

by analyis of the need and problems concerning current national network

it comes up with the necessity and purpose to optimize network.and As soon as it brings up problems concerning current national network

it establishes the priciples to optimize network

and discusses the definition of every factor in network transmission.After that

this article discusses the realization of network optimization

which is also the main part of this article

it mainly gets started from clarification of the process to realize network optimization

and introduces every aspects of network optimization

in other words

it gets started from the examination affecting network and 3 key factors that forms network（network structure

transmission equipment

cable）

to discuss the content of optimization.Finally

by combination of current situation of network and the development trend in the future

it provides some suggestions on how to realize network optimization.