The utility model discloses a filler modular artificial wetland. The wetland filler is arranged at a crossed order according to a plurality of modules, of which the outer frame is box-shaped with no cover. Fillers are filled in the outer frame and each modular is fixed mutually. The size of the outer frame periphery is that the length, the width and the height are all 100 millimeters-1000 millimeters and the wall-thickness of the outer frame of modules is 2 millimeters-4 millimeters. A plurality of perforations are arranged on the outer frame of the modules. The utility model is capable of being refitted and disassembled according to the practical demands, which saves manpower and materials and reduces the cost.