Filler-replaceable double-layer planting sleeve running water type modular artificial wetland device

The invention provides a filler-replaceable double-layer planting sleeve running water type modular artificial wetland device which comprises a multi-box combined type water flow guide box, and a double-layer suspension type filtering oxygenation device and a filler-replaceable double-layer planting sleeve are arranged in the multi-box combined type water flow guide box, the double-layer suspension type filtering and oxygen adding device is located at a water inlet of the multi-box combined type water flow guiding box and used for preliminarily filtering inlet water and increasing the oxygen content. The filler-replaceable double-layer planting sleeve comprises two layers of sleeves, the outer sleeve is fixed, the inner sleeve is movable, and the inner sleeve is filled with filler; the multi-box combined type water flow guide box guides water flow to form upward flow and downward flow under the action of gravity. The device is suitable for areas such as buildings, communities, urban motor vehicle lane green b