The utility model provides a
landscape design green
plant cultivation device which comprises a device body, the device body comprises a box body, a cavity is formed in the box body, a planting box is movably installed in the cavity, a reinforcing plate is fixedly installed on the side of the box body, a supporting
assembly is movably installed in the planting box, and the supporting
assembly is fixedly installed in the box body. The supporting
assembly comprises a supporting
pipe, a threaded column is fixed to one end of the supporting
pipe, a threaded hole is formed in one side of the planting box, and the threaded column is rotationally installed in the threaded hole. When the
landscape design green
plant cultivation device is used, water is sprayed to a
sponge plate from a spray head through a water pump, water on the
sponge plate makes contact with soil, the soil adsorbs the water and transmits the water upwards, the soil at the root of a green
plant is kept wet, and therefore the water needed by growth of the green plant is prolonged, and a
trunk of the green plant is supported by an arc-shaped frame in the later period; the
diameter of the arc-shaped frame is expanded along with increasing of the
diameter of the
trunk in the later period, so that damage to the
trunk caused by the arc-shaped frame is avoided.