Reanalysis technique for structural dynamics modifons is an important theoretic8lanJysis tool for structura1/mechanical viration control and dynamic characteristics designand optimization. The main computation methods for efficient structural-ynamics-modifica-tion reanalysis are briefly reviewed in this paper,and an emphasis is put on the perturbation-al reanalysis methods.Several significant application fields of the reanalysis methods aresimply introduced at the end.