Urban building garden ecological greening device

The utility model relates to the technical field of landscaping. The utility model relates to a greening device, in particular to an urban building garden ecological greening device. Planting pot, a water storage pipe is arranged on one side of the planting pot; the planting pot is slidably connected to the inner side of the water storage pipe; the inner side of the planting pot is fixedly connected with a filtering water-absorbing cotton net; a mounting hole is formed in one side of the planting pot; water absorption cotton swabs are fixedly connected to the inner sides of the mounting holes;one end of the water absorption cotton swab is fixedly connected to one side of the filtering water absorption cotton net, the floating block is arranged on one side of the planting pot and slidablyconnected to the inner side of the water storage pipe, the through hole is formed in one side of the floating block, the water absorption cotton swab is slidably connected to the inner side of the through hole, and the annular