Abstract: Against a background of electrical energy management of iron and steel plant， the distributed network structure of power generation nodes was established by using topology knowledge in iron and steel plant， with its evaluation indices given. Then， the principle of optimizing the network structure was proposed. It is shown that the distance between the nodes(coke dry quenching power generation， combined cycle power plant (CCPP) and blast furnace) and between the equipment such as steam pipe， gas pipe are as short as possible. The coke dry quenching equipment， CCPP and blast furnace should be located in a straight line. Six kinds of topological structures most suitable for iron and steel plant were developed on the basis of the optimization principle， thus reducing the energy consumption and the electricity cost.

Key words: energy use, electricity, power generation node, topological structure, iron and steel plant