Abstract: Through field measurements of noise on and around the urban rail transit elevated line with common slab track,the spectrum characteristics of the noise on top of and on side of box type beam are analyzed and compared,as well as the energy distribution characteristics of the noise on side of the viaduct in different frequency bands. The influence range of Doppler Effect on frequency shift is analyzed. A Matlab simulation program is built based on the partial coherence theory,multi-input and single-output simulation model is established. The correlation and contribution of bridge structure-borne noise and wheel-rail noise at 1/3 octave of the overlapping frequency are calculated. The results show that in low frequency band under 250 Hz,urban rail transit elevated line bridge noise is contributed mainly by wheel-rail noise;in the sound shadow area of the bridge close to the ground and the comprehensive noise area far from the bridge,the noise is mainly contributed by the bridge structure-borne noise,and different parts of the bridge plates have different impacts that from most to least are the bottom,the flange and the web.Structure noise control should emphasize on the bottom.