Abstract: In order to effectively prevent and control the soil erosion, improve the soil organic matter & soil fertility and promote the the growth of fruit trees, the herbages such as Chamaecrista rotundifolia and Arachis pintoi were interplanted in the orchard for a long time. The results showed that interplanting the herbages could significantly increased the content of soil organic matter in both the downward slope and terrace orchard, with an increase of 9.09%-32.81%. Interplanting herbages in the terrace orchard was more beneficial to the accumulation of soil organic matter than that of the downward slope. With the passage of testing years, the contents of fulvic acid and humic acid in all the treated soils showed an overall increasing trend. And interplanting herbages in the the downward slope and terrace orchard were more beneficial to the accumulation of soil humus, and the interplanting effect of Arachis pintoi was better than that of Chamaecrista rotundifolia.