Field experiments on desertified soil in the Hexi Corridor were carried out to compare soil building effects between Treatment I (non-tillage + leaving stubbles + mulching with straws), Treatment II (non-tillage + leaving stubbles) and Treatment III (traditional farming produce). Results showed that Treatment I had the best soil building effect, reducing total salt, porosity and pH of the plow layer (0~20 cm) by 1.86 g/kg, 5.28 % and 0.32, respectively and increasing aggregate structure, natural moisture and moisture holding capacity of the soil by 72.5 g/kg, 32.95 g/kg and 111.98 m³/hm², respectively and yield, output value and profit of the crop of corn by 1.95 t/hm² or 21.56 %, 1600 yuan/hm² and 600 yuan/hm², respectively. Besides, its soil organic matter, total N, readily available N, readily available P, readily available K and CEC all increased correspondingly.