The present invention eliminates the need for a separate buoyant body or structure to ensure economical efficiency due to the simplification of the structure. Even when the plant is planted on the planting base, the plant itself can be roots on the planting base without having to form a large number of through-It can support the root of the plant firmly, and it can make the simplification and efficiency of the planting work, and it is able to absorb the floating matter on the water through the planting substrate, The present invention relates to an artificial anchovy island prepared by a method of landscape gardening using an artificial aquatic island and a method thereof, which floats a planting base made of a squeeze carbonized corkboard on water to allow water to be absorbed, And the stem are cut to the same length, and then placed on the planting base on the water, and the root is roots to find the planting base pore Planting steps down and wait; A support frame for preparing a support frame made of a material which is rotten or unchanged by water is prepared by preparing a support frame in the form of a frame which surrounds the outer periphery of the planting base planted with water plants through the planting step,; The planting base on which the water-side plants are planted is transported to a site in a river or a lake and floated on the water, the support frame prepared by the support frame preparation step is covered on the outside of the planting base,;
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