Aiming to reveal the differentiation of crop growth and water and fertilizer migration by topography，and explore the relationship between crop growth and slope type change in field scale，a cooperative in typical black soil area of Northeast China was selected as the study area to extract high precision digital elevation model (DEM) and normalized differential vegetation index (NDVI) information along the north and south ridges. The spatial variability of NDVI was analyzed by constructing terrain index. The results showed that the more obvious the degree of terrain protruding and concave was，the greater the spatial variability of NDVI was. The NDVI spatial variability of the same slope type was negatively correlated with the degree of protruding and concave of the slope type，and the crop growth was good and the spatial variability was low within the slope of ±0.03，and the spatial variability was low. The line scale and slope length were above 0.04, which explained the spatial variability of soybean NDVI of 0.9652(R2) and sorghum NDVI of 0.8883(R2). There were significant differences between topography and soil-forming parent material in different geographical space. Through the analysis between crop growth and topographic conditions in the study area，it provided important reference significance for the analysis of field scale topography，and it can guide farmers to allocate resources reasonably，which had strong practicability.