Facade regreening planting structure of retaining concrete and construction method of facade regreening planting structure

The invention discloses a retaining concrete facade greening planting structure and a construction method thereof, the retaining concrete facade greening planting structure comprises a plurality of floating platens, the floating platens are mounted on the outer facade of retaining concrete, and the floating platens are arranged at intervals in the vertical direction; the lower portion of the composite mesh is installed on the floating platform plate, the upper portion of the composite mesh is obliquely upwards arranged towards the outer vertical face, the slope ratio of the composite mesh is smaller than 1: 0.25, a plurality of embedded steel bars are installed on the outer vertical face, the embedded steel bars are connected to the composite mesh, and a base layer space is formed among the composite mesh, the floating platform plate and the outer vertical face; the ecological improvement base layer soil is filled in the base layer space and comprises modified glutinous rice base mud soil, a slow release fert