A kind of new method of theory to analyze kinematics and dynamics of epicyclical gear trains is provided.According to the systematization graph model
adopt the concrete systematization method to analysis epicyclical gear trains
In theory
the relation of Kirchoff’s law and epicyclical gear trians’ parameter has been proved.Kirchoff’s law concrete mathematical formalism which can solve kinematics and dynamics of spicyclical gear trains of EGTs-loop-equations、 cut-equations is created.At last
by mean of smulation the validity of theory is proved.