Abstract: The construction technology of resonant combined track bed vibration reduction system for urban rail transit in subway elevated lines was introduced, and online tests on the vibration and noise of the track bed after operation conducted.Resultsshowed that compared with the ordinary track beds, the amount of vibration reduction of the bed system of the combined track bed system reached 18.2 dB, the noise beside the track reduced by 5.1 dBA, the noise under the bridge reduced by 8.1 dBA, and the noise at the horizontal distance of 20 m under the bridge reduced by 2.3 dBA. The combined track bed system had excellent vibration and noise reduction effects, and the construction technology was mature and perfect, which could be applied to the special vibration reduction of urban rail transit.