In order to investigate the relationship among soil organic carbon and small environment and lithology in different karst landforms that the Karst plateau (KG),Karts peak-cluster depression (KF),Karst canyon (KX),Karst virgin forests (KY) and Karst trough valley (KC) were taken from Puding,Xingyi,Guanling,Libo and Yinjiang in Guizhou province,respectively. The content of soil organic carbon in soil horizons (0-10,10-20,20-30 and 30-40 cm) and organic carbon in the critical surface between bottom soil layer and bedrock were was tested by the method of potassium dichromate,and then counting out the density and storage of Soil organic carbon,the spatial distribution characteristics of soil organic carbon in different karst landforms was analyzed. The results showed that the content,density and storage of soil organic carbon in different rocky desertification class were 113.18~163.98 g/kg,1.08~7.32 kg/m³ and 4.07~24.29 kg,respectively. The soil organic carbon is gradually reduce with the increasing of kasrt rocky desertification degree,and then the soil organic carbon concentration in stone trough is higher than other small environment types,and the content of soil organic carbon in the soil above on Limestone and Marl are more than other Lithology types as well. There is a large discrepancy of soil organic carbon among different karst landforms,in same ecology environment the soil organic carbon storage in KY and KC are more than other landform types. The soil organic carbon move along the evolution chain of Karst rocky desertification process,and the change of Small environment and Lithology in different karst landforms are play an important role in the spatial rebuild of soil organic carbon. The ecology environment of karst mountainous area is complex. If we want to get a more sensitive method to estimate the soil organic carbon in different karst landforms,further studies concerning soil organic carbon among different karst landforms were required.