Abstract: The biological approaches for improving alkaline-saline grassland were studied. The first method is to improve the physical-chemical characters of alkaline-saline soil by setting up a litter layer and sowing Aneurolepidium chinense,which can led to a fast restoration of grassland vegetation. The second method is to sow alkaline-saline grasses, which could gradually accumulate the organic matter and led a gradual restoration of the natural vegetation. In comparison with the control, the improved area by adding litter 1.5kg·m-2 had a soil bulk density of 1.10g·cm3 much more lower than that of control (1.7g·cm3). The soil hold degree, water content and air content were also increased by 41.7%, 31.7%and 170.0% respectively. While soil pH value decreased from 10.1 to 8.5,the total salt content and soil conductivity rate drooped by 34.1% and 40.0% respectively; soil alkaline degree decreased from 60.59% to 35.75%. Planting Chloris virgata is one of the most effective ways for improving alkaline-saline grassland. In the fourth year after the improvement ,the alkaline patches were recovered by vegetation and community yield reached 450g·m-2 in which Aneurolopidium chinense yield made up over 45%. Experimental result showed that A. chinense could live on alkaline-saline soil improved by adding litter 1.5g·m-2,the community yield might reach 600g·m-2and A. chinense grassland could be recovered to primary type at the fourth year after the improvement.