Permeable pavement bioretention device

The invention discloses a permeable pavement bioretention device comprising a permeable pavement structure and a bioretention structure. The permeable pavement structure comprises a permeable concretesurface layer, a porous cement stabilized macadam layer, a grading gravel macadam layer and a soil base layer. The bioretention structure includes an ecological tree pool disposed on a sidewalk. A rainwater well is disposed between the permeable pavement structure and the bioretention structure, and a plurality of permeation diversion guide pipes are connected to the bottom of the rainwater well.The permeable pavement bioretention device realizes reasonable connection of permeable pavement and bioretention, and compared with single measures such as the permeable pavement or the bioretention,the combined application can more effectively improve the drainage design standard. Pavement runoff is reduced, rainwater is returned to the underground, urban waterlog is prevented, non-point sourcepollution caused by rainfal