The invention discloses a shopping mall green plant mounting system and a construction method and application thereof. The shopping mall green plant mounting system comprises a modeling stainless steel plate, first screw hanging bars and a steel frame transformation layer, wherein the modeling stainless steel plate is fixedly connected with the steel frame transformation layer through the first screw hanging bars. The modeling stainless steel plate is fixedly connected with the steel frame transformation layer through the first screw hanging bars, not only are positioning setting-out of comprehensive modeling of an special-shaped ceiling and accurate mounting of the special-shaped ceiling facilitated for a designer, but also the flatness of the whole top face of the special-shaped ceil is guaranteed, the construction process is simple, and the site construction efficiency is improved.