Abstract: In order to probe into the process between soil organic carbon mass fraction (SOCMF) and soil water infiltration in different forest plant communities, the forest SOCMF was drown into Horton model as independence variable, which is amended with it. The results showed that the SOCMF was distinct in different forest plant communities. It was the largest in broad leaved mixed forest, and then followed by mixed coniferous and broad leaved forest, coniferous mixed forest, and mixed arbor and shrub forest. Both the initial infiltration rate and the difference between the initial infiltration rate and steady infiltration rate have linear relationship with SOCMF. After Horton model amended, there is a great agreement between simulations and measurements. The study provided a new method to forecast and simulate forest soil water infiltration process in the similar regions.