This study aimed at exploring the content change of different fractions organic carbon in soil aggregates of solar greenhouse at different plant years.In order to analyze the content change of light fraction organic carbon(LFOC) and heavy fraction organic carbon(HFOC) in different soil aggregates，we took paired soil samples from five greenhouses(1 year，5 years，10 years，15 years and 25 years) and adjacent highland were also taken as control study.Compared to adjacent highland，solar greenhouse was helpful for the accumulation of different components of SOC.The content of SOC was increased with the planted years and has significant positive correlation with LFOC，R value as high as 0.994 5.However，the HFOC increased slowly.The content of SOC、LFOC and HFOC in different soil aggregates was increased with the cultivating time.The content of LFOC and HFOC from large to small were showed that 250～2 000 μm,53～250 μm,<53 μm in different soil aggregates in the same plant years.The average content of LFOC and HFOC in different aggregates were 2.3 times and 1.5 times higher than highland.The different components of soil organic carbon pool were mainly influence by 250~2 000 μm soil aggregates，the value of R respectively were 0.993,0.991 and 0.967.