通过５年的试验样地定点观测及野外大面积调查，收集了不同条件下的刺槐生长量数据３２０多组，利用方差方析定性得出了显著影响黄土丘陵区刺槐胸径生长的因子有年降雨量林龄、地面坡度、林分密度及地形部位．利用回归分析定量得出了这５个因子对刺槐胸径生长影响的关系模型。影响最显著的因子是年降雨量，其它依次为林龄、坡度、林分密度、地形部位。 Through 5-year fixed-point observation and large area survey in the experimental plots, more than 320 sets of data on the growth of Robinia pseudoacacia were collected under different conditions. Qualitative analysis of variance showed that the factors influencing the DBH growth in Loess hilly region were annual rainfall Amount of forest age, ground slope, stand density and topography. Regression analysis was used to quantitatively determine the relationship between these five factors and DBH growth. The most significant factor is the annual rainfall, followed by the stand age, slope, stand density, topography.