Ecological open channel

The utility model discloses an ecological open channel. The drainage ditch comprises two ditch walls and a ditch bottom plate connected to the bottoms of the two ditch walls. The canal bottom plate comprises a first permeable layer and a second permeable layer which are sequentially arranged from top to bottom, the first permeable layer comprises a planting part and reinforcing parts located on the two sides of the planting part, the top faces of the reinforcing parts are connected with the bottom faces of the canal walls, the planting part is located between the two canal walls, and the second permeable layer is composed of gravels. The first permeable layer is provided with a channel inner planting part, plants can be planted in the planting part, the plants further absorb fertilizer residues and the like in the water body, and eutrophication of the water body can be obviously weakened. Due to the arrangement of the second permeable layer, the material exchange frequency of stored water in the channel and a