In this article, a new achievement of fractional order 3×n Fan networks is presented. In the first step, the RT-I method is used to derive the general formulae of the equivalent impedance of fractional order 3×n Fan networks. In the second part, the effects of five system parameters (L, C, n, α and β) on amplitude-frequency characteristic and phase frequency characteristics are analyzed. At the same time, the amplitude-frequency characteristics and phase frequency characteristics of fractional order 3×n Fan network are revealed by Matlab drawing. This work has important theoretical and practical significance for resistor network models in the field of natural science and engineering technology.