Abstract: Nowadays the governments and scientists paid more attention to the environmental problems caused by global warming.As the source and sink of atmospheric CO2,the role of the soil carbon in the global carbon cycle was realized gradually.According to the previous researches over the world,the scientific progress was concluded,including the potential capacity and mechanism of soil carbon sequestration,influence factors as well.All research results showed that the cultivated land fertility was unstable;density soil organic carbon was lower.That meant there was big potential to soil carbon sequestration.So further research should be mainly focusing on the potential,process and mechanism of soil carbon sequestration,and then designed the reasonable and optimal agriculture management.

Key words: Soil organic carbon, Soil organic carbon, Carbon sequestration, Carbon cycling, Climate change