The invention relates to the technical field of electric power system, A method for coordinate control of damping of multiple interval oscillation mode in a UHV power network is disclosed, Based on the information of multiple weak damping modes and sensitivity of damping ratio, a multi-objective on-line optimization strategy based on mean square error is adopted, and the output of generator set isoptimized by using genetic algorithm, so as to improve the damping of multiple interval oscillation modes and realize the prevention and control of UHV power system oscillation.