The invention discloses a method for quickly improving inland severe 
saline-alkaline wasteland. The method mainly comprises the steps of scraping ground surface 
salinity, performing deep ploughing and stubble cleaning, spreading desulfurization 
gypsum and weathered 
coal in a layered mode, digging drainage ditches, making field ridges to form strip fields, finely flattening the land, performing leisure salt leaching in rainy season, evenly applying an 
organic fertilizer and a modifying agent, performing winter 
irrigation for salt leaching, continuously spreading the desulfurization 
gypsum and weathered 
coal in the second year and third year in a layered mode, evenly applying half of 
organic fertilizer and modifying agent dosage and performing winter 
irrigation for salt leaching; planting leguminous 
green manure vicia villosa or alfalfa in the first year after improvement, performing mowing and 
green manure dressing and ploughing soil at a vigorously growing stage; planting sugarbeet or 
forage maize at the second year; planting grain corns or sorghums at the third year, and normally ploughing and using the land at the fourth year. The method for quickly improving the inland severe 
saline-alkaline wasteland integrates 
water irrigation and drainage, salt leaching, soil salinization controlling on flat ground, chemical salinization improvement, biological salinization controlling and other technologies and can quickly reduce 
soil pH and ESP of the inland 
saline-alkaline wasteland, improve the saline-alkaline wasteland improving speed and shorten an improvement period for changing the wasteland into 
cultivated land.