The invention discloses a comprehensive improvement method suitable for inland extreme
arid area
saline-
alkali soil. The method is formed by integrating multiple technological innovations of levellingsoil and eliminating salt accumulation in surface soil, returning
straw to field and improving a soil body structure so as to block a
salinity ascending channel, additionally applying an
organic fertilizer and optimizing fertilized soil to improve a
crop saline-alkaline tolerance capacity, deep-plowing soil and adjusting grain compositions so as to retard
salinity ascending, additionally applyingan improver and creating a low-salt
rhizosphere micro-environment, covering by
straw and preventing soil salt return, rationally irrigating for salt-leaching and desalting and the like. The technology can be applied for performing
straw simplification on preceding crops and rapidly and directly returning to the field, relieving labor intensity of a farmer, adequately using straw
nutrient resources for usage by crops in the next season, reducing an applying quantity of a chemical
fertilizer, and reducing agricultural production cost. An isolating layer is formed in a soil body, so the ascending of underground water and
salinity in the lower soil body is retarded, and the salt accumulation in the surface soil and the salt return are reduced. The method has multiple functions of improving the
saline-
alkali soil, improving production capacity of
cultivated land, increasing production, saving cost and increasing income and the like, and is remarkable in economic, social and
ecological environment benefits.