The aim of the field experiment was to investigate the effects of different cultivated modes on the com-bined states of humus of phaeozem in northeast China. Soil humus was extracted adopted grouping method of humuscombined forms modified by Xiong Yi-Fu Jiping, then the soil organic carbon contents were determined respective-ly. Experimental results showed that the content of humus of phaeozem in different cultivated modes was different.Among them, there were little variation in the content of loosely-combined humus and unitedly-combined humus,but there were great changes in the content of stably-combined humus and tightly-combined humus. C value wasthe highest in the content of them. The influence to HA/FA showed little impact on loosely-combined humus andgreat impact on unitedly-combined humus and stably-combined humus because of the significant differences be-tween the disposal of C, D and F. Different cultivated modes had little effect on E4/E6 in black soil, and the E4/E6 of loosely-combined humus and stably-combined humus had no obvious change, only in the unitedly-combined hu-mus of E4/E6 were there significant differences between the disposal of E,F and A. The cultivated modes were differ-ent, so the contents of various forms of humus were different. Among them, overall performance of C treatment wasthe best, which improved the content of different combined humus.