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A proven beam-track contact model was used to analyze the track-structure interaction of CWR (continuously welded track) on bridge.Considering the impact of adjacent bridges,the tower-cable-track-beam-pier pile finite element model of the cable-stayed bridge was established.Taking a bridge group including 40-32 m simply-supported beam and (32+80+112) m single-tower cable-stayed bridge and 17-32 m simply-supported beam on the Kunming-Shanghai high-speed railway as an example,the characteristics of CWR longitudinal force on the cable-stayed bridge were studied.It is shown that adjacent bridges must be considered in the calculation of the track expansion force and bending force on cable-stayed bridge.When the span amount of adjacent bridges is too numerous,it can be simplified as six spans; the fixed bearing of adjacent simply-supported beams should be placed on the side near the cable-stayed bridge; the track expansion device should be set at the bridge tower to reduce the track force near the bridge abutment.