Ecological bottom protection system based on aerated porous lightweight concrete

The utility model belongs to the technical field of porous concrete, discloses an ecological bottom protection system based on aerated porous lightweight concrete, and aims to solve the problem that the adsorption and filtration effects of the porous concrete cannot be fully exerted due to the single arrangement structure form of the porous concrete. The device comprises a pre-sedimentation purification area, a first porous ecological filter bed, a shallow water type plant humid area, a second porous ecological filter bed and a deep water type plant humid area which are sequentially arranged in the water flowing direction, the pre-sedimentation purification area comprises a sedimentation tank which is arranged at the bottom of the riverbed and has a trapezoidal section, the bottom of the sedimentation tank is lower than the bottom of the riverbed, a porous concrete block is laid at the bottom of the sedimentation tank, and an ecological floating island for planting plants is arranged above the porous concrete