Abstract: In order to guide agricultural production， and provide references for the sustainable use of soil resources， the spatial auto\|correlated characteristics of soil electric conductivity in Guohua demonstration zone were studied using classical statistics and “3S” technology， along with the combination of indoor sampling and field monitoring. It was shown that the variation of soil electric conductivity in Guohua demonstration zone was intensive （CV>30%）. The spatial distribution of soil electric conductivity was positively auto\|correlated with soil depth， which decreased with the increase of soil depth. Soil conductivity in the study zone belonged to the “low\|low” spatial agglomeration type. The spatial distribution of low\|value area was relatively concentrated， and was mostly surrounded by adjacent low\|value areas. The spatial autocorrelation distance of soil electric conductivity was 2 200 m in 5 and 10 cm soil depth， and was 1 400 and 1 000 m， respectively， in 20 and 30 cm soil depth.

Key words: soil, electric conductivity, spatial autocorrelation