Abstract: Based on the three phases of land use data and DEM data in the Guangxi border areas in 1980, 2010 and 2018 and by using the landscape ecological risk index, land use transfer matrix, topographic distribution index and other methods, the landscape ecological risk in the border area of Guangxi for the past 40 years was evaluated from the perspective of "production-living-ecological" space. At the same time, the spatial function transformation of "production-living-ecological" space and the influence of topographical factors on it were also explored. The results show that the ecological and production spaces were squeezed by the living space. During the study period, the living space had expanded significantly by 9 134.97 hm², while the ecological space and production spaces decreased by 3 899.60 and 5 235.40 hm², respectively. Landscape ecological risk as a whole was in a relatively low degree, while in some areas the risk increased first and then decreased. The land use function transformation of "agricultural production space-forest land ecological space" and "urban and rural living space-agricultural production space" had higher contribution rates to landscape ecological risk, which were 1.01% and 0.21%, respectively. From the perspective of the distribution of landscape ecological risk on the terrain gradient, altitude and slope were inversely related to the degree of landscape ecological risk. The above research results can provide reference for promoting the coordinated development of regional "production-living-ecological" space, for constructing a landscape ecological security pattern, and for exploring the optimal layout of high-quality land use with ecological priority and green development as the guidance.

Key words: “production-living-ecological” space, landscape ecological risk, terrain gradient, Guangxi border area