Sound insulation glass for rail transit and mounting structure of sound insulation glass

The utility model discloses sound insulation glass for rail transit and a mounting structure of the sound insulation glass, which belong to the technical field of rail transit noise abatement and comprise outer layer glass and inner layer glass, spacing bars are arranged between the outer layer glass and the inner layer glass and along the circumferential direction of the outer layer glass and the inner layer glass, and the spacing bars are arranged on the outer layer glass and the inner layer glass. The spacing bars are respectively adhered to the outer-layer glass and the inner-layer glass in a sealing manner, a cavity of an enclosure layer of the outer-layer glass, the inner-layer glass and the spacing bars is a middle air layer, and a plurality of sealants are arranged in the middle air layer. Existing double-layer sound insulation glass is improved, the outer layer glass is set to be different in thickness under different scenes, the balance between performance and cost is achieved, the penetration resis