The invention belongs to the electric power system damping controller technology field and especially relates to a unified power flow controller and multi-damping controller sectional type combination design method. The method is characterized by firstly, carrying out power flow calculation on an electric power system to acquire a steady-state value of each variable; and then setting a target function; through a direct optimum seeking method, calculating and acquiring an equivalent damping coefficient of a UPFC damping controller; after a modulation signal of an additional damping control signal is selected, using a phase compensation method to complete a design of an additional damping controller so as to effectively restrain electric-power-system low frequency oscillation. By using the UPFC and multi-damping controller sectional type combination design method, through coordinating and designing the plurality of damping controllers installed on the UPFC, multi-machine power-system low frequency oscillation is restrained. Through a sectional type design method, a physical process of the damping controller design is clear.