The invention discloses a method for realizing the position optimization of a solar wing frequency modulation actuator, which comprises the following steps: (1) according to the range of the solar wing frequency modulation loading area, determining the parameter variation range; (2) The nonlinear static analysis module based on Nastran software generates a working condition file with actuator action; (3) Modifying the *. Bdf file information generated by Nastran by GA in Matlab, defining the objective function to search globally, and finally obtaining the optimal actuator placement. GA geneticalgorithm in MATALB calls model calculation file generated by modify Nastran to carry out global search, Because genetic algorithm has the advantage of global optimization and NASTRAN computing poweris utilized, it can effectively determine the optimal position of the solar wing structure frequency modulation, which has practical engineering significance.