This paper begins with the analysis of factors affecting the esta-blishmet of network state equations. On the basis of characteristics of networkclement

a rational formntation order of elements as twigs and links is proved.According to the order

a best tree can be drawn

which is helpful to for-mulate state equations

Two examples are enumerated On the basis of the besttree

topological equations of network are written. By inserting operationswith both topological equations and characteristic formulas

a standard stateequation is derived as a result of eliminating the undesired variables. Thismethod is simpler and more convenient as compared with the others in theand has advantage of both the topological method and the direct operations

method.