Root blocking and flood drainage device suitable for bougainvillea speetabilis bridge greening

The utility model discloses a root blocking and drainage device suitable for bougainvillea speetabilis bridge greening, which comprises a root blocking part, the length of the root blocking part is equal to the inner width of a planter, the height of the root blocking part is larger than or equal to the thickness of a soil layer in the planter, and the root blocking part is provided with a partition surface facing the soil layer and a supporting surface close to a partition wall in the planter. A separating layer is formed between the separating surface and the supporting surface, and a plurality of through holes communicated with the separating layer are formed in the separating surface and the supporting surface; the front end of the supporting rod is connected to the supporting face, and the rear end of the supporting rod is connected to the partition wall, so that an empty groove is formed between the supporting face and the partition wall. Soil and a partition wall in the planter are separated by the dev