The invention relates to a modern agricultural planting
hidden layer filter and drainage and water and soil improving high-yield technology blind drain. An
isolation layer, a first filter layer, a second filter layer, a third filter layer, a fourth filter layer and a fifth filter layer are sequentially arranged below a soil
plough layer from top to bottom, wherein the first filter layer is composed of coarse sand, the second filter layer is composed of coarse sand and
melon seed-shaped gravels or small gravels, the third filter layer is composed of
melon seed-shaped gravels or small gravels, the fourth filter layer is composed of inch gravels or medium gravels, and the fifth filter layer is composed of large gravels. A laying layer is arranged on the upper layer of the
isolation layer, and a filter net is arranged on the lower layer of the
isolation layer. The laying layer is composed of mountain grass or bamboo or leaves or fruit shells or
straw or halm or
husk. A pipeline with no filter net or a drainage pipeline wrapped by a filter net are arranged in the fifth filter layer and is higher than the horizontal plane of
water flow in a canal or river, and a plurality of small holes are evenly formed in the
pipe body for
water flow. Water in soil on a farmland planting
surface layer or
hidden layer is drained after being filtered, the drained
water quality is improved, the
hidden layer soil water level is lowered, and the deep
desalination and
dealkalization effect can be achieved for salt and alkali farmland. The modern agricultural planting hidden layer filter and drainage and water and soil improving high-yield technology blind drain is easy to construct, practical, durable and low in cost.