To find out the amelioration effect of Arkadolith,a new soil modifier on sandy soil physical and chemical properties and the growth of A stragalus mongolicum,adominant species in sandland community in Kubuqi Desert,effects of different application rate(CK:0%;A₁:4%; A₂:8%;A₃:12%;A₄:16%)of Arkado-lith were compared by means of simulated experiment in laboratory.The results show that the application of Arkadolith can significantly improve the growth status of A stragalus mongolicum,the growth of new shoots increase by 4.35%~ 43.5% and biomass increase by 36.8%~ 168.5% with the decrease of the root shootration at the same time,leaf numbers follows the order of A₄> A₂>A₃ >A₁>CK.Meanwhile,use of Arkado-lith increase plant water absorption,raise leaf water potential,revealing the improvement of plant water status.The total porosity of soil and field capacity increases,bulk density and soil infiltration rate decrease after application of Arkadolith,indicating that it has significantly improved soil physical properties.It also canal-leviate soil nutrition imbalances by increasing soil nutrient reserves.