Sound barrier mounting structure of existing rail transit line

The utility model relates to a sound barrier mounting structure of an existing rail transit line, which comprises two groups of line-side sound barriers mounted on the left side and the right side of the rail transit line, and each group of line-side sound barriers is mounted on a handrail bottom plate on the corresponding side and positioned on the near-line side of a handrail on the corresponding side. According to the sound barrier installation structure of the existing rail transit line, the line side sound barrier is installed on the handrail bottom plate and located on the near-line side of the handrail on the corresponding side, the line side sound barrier is made to be close to a rail as much as possible on the premise that the limit requirement is met, wheel rail noise can be effectively absorbed, and the noise reduction effect is effectively improved on the condition that the noise reduction requirement is met. The height of the line side sound barrier is correspondingly reduced, so that the load of