Abstract: In order to seek main factors that affect the survival percentage of air-seeding,multiple factors were studied in two kinds of main dune types in Yulin air-seeding area.12 factors were investigated in the first dune type,where sand dune is concentrated,space is very narrow between sand dunes and water table is very deep;16 factors were done in the second dune type,where the natural condition is opposite to the first one.The two groups of data were calculated with BASIC program by microcomputer,the result shows a homogenous regularity.It indicates that the main factors which affect the survival percentage of air-seedling are:the slope area of wind ward side,the area of plant community,the seedling density,whether the sand dunes be chain,the slope pattern,plant height,crown diameter ect.The achivement of the study provides a scientific basis for selecing sites in air-seeding area and improving the survival percentage of air-seeding.