Gradual-descending type water-wet woody plant water-entering cultivation device

The utility model relates to a gradually descending type hydroponic woody plant hydroponic cultivation device, which comprises a support rod, a plant enclosing facility, a sand absorbing mechanism and a sand flushing mechanism, the support rod part is arranged in a riverbed, the plant enclosing facility is arranged in the riverbed, the middle lower part of the plant enclosing facility is filled with sand grains, plants are arranged above the sand grains, and the sand absorbing mechanism is arranged above the sand grains. A sand suction opening of the sand suction mechanism and a sand flushing opening of the sand flushing mechanism are both formed in the bottom of the plant enclosure facility. The device has the advantages that sand grains flow through the sand flushing mechanism, meanwhile, the sand grains in the plant pit body are sucked out through the sand suction mechanism, then plants descend to the bottom of the plant enclosure facility, gradual descending type planting of water-wet woody plants is achi