Abstract: The agricultural technology diffusion is a complex system which is composed of technology centers, technology receivers and diffusion environment. The diffusion environment is a multidimensional synthesis, and as a external influence factor of the agricultural technology diffusion, it plays an important role in the diffusion. The development level and the spatial pattern effect the direction, speed and the mode of the diffusion. Therefore, the special analysis of the agricultural technology diffusion environment for the specific regions is meaningful to the understanding of these regions'agri-technique diffusion. The quantification and evaluation of the agri-technique diffusion environment can provide many beneficial references to the diffusion. This paper take the 169 counties in Shaanxi-Gansu- Ningxia region as the research objects, choose the 12 main indices, and use the principal component analysis to description the gap among the 169 counties. Then uses the spatial analysis provided by GeoDa to reveal the spatial characteristics. The result shows that there are three main factors affect the agri-technique diffusion environment, includes the agriculture output efficiency and cultural atmosphere, agricultural resources conditions, agricultural input level; the agri-technique diffusion environment in 169 counties has significant differences and geographical spatial agglomeration;“ hot-spots”counties concentrate on Guanzhong region, Hexi corridor and the irrigated area by Yellow River in north Ningxia province, the most“cold-spots”counties are located in middle and north part of Gansu province; the space differentiations of the environment of agri-technique diffusion of Northwest China are mainly caused by the spatial differences of the natural conditions and the social economy and culture. The results of the study tell us that we must do something to optimize the agri-technique diffusion environment: using the space connection to achieve collaborative optimization; paying more attention to the ecological environment construction and developing sustainable agriculture; promoting rural social culture construction and optimizing the social environment of the diffusion.

Key words: agri-technique, diffusion environment, Shaanxi-Gansu-Ningxia region, spatial autocorrelation