Water retention type geotextile bag and green land application method thereof

The invention provides a water retention type geotextile bag and a green land application method thereof. The water retention type geotextile bag comprises top cloth, lateral cloth and bottom cloth, wherein the lateral cloth is annular, the top cloth is connected with the upper end of the lateral cloth, the bottom cloth is connected with the lower end of the lateral cloth, the top cloth is water-permeable geotechnical cloth, and the lateral cloth and the bottom cloth are water-tightness geotechnical cloth. The green land application method includes: during construction of a green land, filling the water retention type geotextile bags with filler, tying the openings of the geotextile bags, and piling the geotextile bags for standby; digging until the depth required plant planting is reached, placing the geotextile bags in pits, tamping, backfilling upper soil, and planting plants. The water retention type geotextile bag has the advantages that the geotextile bag is simple to manufacture, energy saving, environmental friendly and high in water retention effect, greening water saving is benefited, partial flood control can be achieved, and slope strengthening is benefited while greening waterproof problems are solved.