The spatial variability of exchangeable manganese content in cultivated soils was investigated based on 1994 samples gathered from the 0~20cm surface horizon of farmland in Shenyang suburbs, Liaoning, China, and a spatial exchangeable manganese content distribution map was plotted by making use of the method of geostatistics in combination with the geographic information system. Results show that contents of exchangeable manganese fitted normal distribution, and its semivariogram a spherical model. The spatial dependence of exchangeable manganese content was moderate ranging around 12.42km witha fractal dimension D being 1.69. Random factors contributed to 36.6% of the spatial variability, while structural factors did 63.4%. The spatial heterogeneity of exchangeable manganese, showed by a Kriging interpolated map, was fundamentally influenced by structural factors such as parent materials and soil types.