Abstract: This study takes the Miao-Bouyei autonomous county of Ziyun as a pilot site and uses geographic information spatial analysis technology to analyze and evaluate the impact of spatial factors- such as the characteristics of farmland, the distribution of agricultural material transportation facilities, and the distribution of agricultural irrigation resources, on the productivity of cultivated land. This study selects influential factors from the results of the census of geographical conditions and geochemical surveys, constructs a sample set of influential factors, proposes the concept of gradient distance, simulates the weight of economic benefits of graded farmland, and builds a partial least squares regression model to evaluate the impact of each factor on farmland production. Finally, from the perspective of geographic space, measures to improve county agricultural production are proposed.

Key words: space analysis, spatial characteristics, gradient distance, cropland production benefit, partial least squares regression model