Modularized landscape sound barrier system with anti-loosening design

The invention discloses an anti-loosening design modular landscape sound barrier system which is characterized in that a sound barrier unit plate comprises a sound absorption material, a perforated panel, a decorative sound insulation aluminum back plate and a keel, and the sound absorption material is arranged between the perforated panel and the decorative sound insulation aluminum back plate to form a Helmholtz resonance sound absorption cavity; each end part of the sound absorption material is coated with a keel, the perforated panel and the decorative sound insulation aluminum back plate are respectively and fixedly connected with the keels, and the decorative sound insulation aluminum back plate extends out along the length direction of the sound barrier unit plate to form a lug plate; the two ends, in the width direction of the sound barrier unit plates, of the decorative sound insulation aluminum back plates form tongue-and-groove structures, the thickness of the lug plates is smaller than the overall