Abstract: Researches on hybrid simulation of broadband ground motion were overviewed in terms of the status, achievement and developing trend. The research status was introduced first in terms of high-frequency simulation approach, low-frequency simulation approach and a combined approach of the high-and low-frequency ground motions. Some improvements were introduced, including the frequency dependent radiation pattern, the frequency-dependent non-linear site amplification factor, the multiple S-S scattering theory, and so forth. Issues worth to be studied in present hybrid simulation were proposed.