Soil organic carbon (SOC),due to its huge capacity and its role in the global carbon cycle and its position in agricultural production,directly affects greenhouse gas emissions from land - based ecosystems,climate change,and soil remediation,which indirectly affect food security,so research on its content and influencing factors has been the focus of global change and agriculture. In this study,the main controlling factors of soil organic carbon (SOC) content in fluvo - aquic soil and cinnamon soil were analyzed and compared by using the method of geostatistics in the eastern part of Yaodu district of Linfen city. The results showed that: (1) In the topsoil of Yaodu district,the average contents of SOC in fluvo - aquic soil and cinnamon soil are 11.81g·kg~(-1) and 6.44g·kg~(-1),respectively; the variation coefficients are 35.85% and 52.33%,respectively,it belongs to moderate intensity variation (2) The correlations of SOC - content in arable layer of fluvo - aquic soil with different irrigation water source,irrigation methods,topography,soil texture,soil parent material and profile configuration reach remarkable level in study area. (3) The SOC content in arable layer of cinnamon soil in study area is mainly affected by soil parent material,topography,soil texture,irrigation water soil,irrigation methods significantly. The above studies show that the spatial distribution of SOC in fluvo - aquic soil and cinnamon soil are mainly affected by topography,soil texture,profile,irrigation water source and planting system.