Road sponge source filtering facility

The utility model provides a road sponge source filtering facility, belongs to the technical field of sponge cities, and solves the technical problems that an existing pebble filtering belt is not easy to clean, the pebble filtering belt is easy to harden, the roadside landscape and the drainage effect are influenced and the like. The road sponge source filtering facility comprises a foundation pit, an opening is formed in the upper end of the foundation pit, a cast iron walling crib is arranged on the opening, a cast iron grate is arranged on the cast iron walling crib, a permeable wall is arranged in the foundation pit, a water collecting chamber is formed between the periphery of the permeable wall and the foundation pit, a plurality of water outlet holes are formed in the periphery of the water collecting chamber, and four filter material baskets are arranged in the permeable wall. Wherein a pebble layer is arranged in one filter material basket, medium-coarse sand layers are arranged in the other three f