Abstract 【Objective】 Rocky desertification in karst areas is a leading problem in Guizhou Province, Southwest China, especially the Huajiang Valley, which is one of the most prominent areas suffering from the problem. In order to address this problem with comprehensive ecological measures, it is of great essence for us to recover forest vegetation so as to promote changes in structure of the eco-environment in karst areas. However, there are still many major issues waiting to be solved in management of the desertification, for example, what kind of ecological as well as economic plants to be selected, how to make reasonable and effective use of natural elements and people's subjective sense of motivation under harmonization between the conditions of local eco-environment and the needs for economical development; how to realize sustainable development of the ecology and economy; how to build a society where people and nature coexist harmoniously; and how to teach people to live coexistently with ecology. Therefore, the paper is aimed to address these issues in an attempt to provide some scientific basis for restoration of water reserving forests and construction of eco-environment. To that end, investigations were made in the Huajiang karst gorge area to explore effects of Zanthoxylum planispinum var dintanensis forest and Lonicera japonica forest controlling soil erosion. Four plots of forests were set up for comparison in effect on soil erosion, i.e. Plot A, a tract of pure Zanthoxylum planispinumvar dintanensis forest; Plot B, a tract of pure, Lonicera japonicaforest; Plot C, a tract of Lonicera japonica-Zanthoxylum planispinum var dintanensis mixed forest; and Plot D, a tract of deserted land. The trees are native in the Huajiang karst valley area.【Method】Three key indices of soil erosion resistance, i.e. soil permeability, soil scour resistance and soil erosion durability, were measured. To measure soil permeability, the cutting ring method was adopted. Based on volume of the water(mm) passing through a cutting ring per unit of time, initial-infiltration rate ( mm•min^-1), stable-infiltration rate (mm•min^-1), and average-infiltration rate (mm•min^-1) of water were worked out, and then soil permeability was. To measure soil scout resistance, the undisturbed soil scouring trough method designed by Jiang, et al. was used. It is mainly expressed by how long it takes for water flow to scour one gram of soil at a flow velocity set in line with mean annual rainfall. And to measure soil erosion durability, soil samples collected from the four plots were sifted trough a stack of sieves (7mm and 10mm) to get soil particles 7~10 mm in size, of which 50 were taken out for erosion test that lasted for 10 min. and how many particles were collapsed was recorded every minute for calculation of percentage of the collapsed particles against the total particles tested, the index value of soil erosion durability.【Result】1) In all the soils, regardless of type, the higher the non-capillary porosity and the total porosity, the higher the soil permeability, while, the higher the bulk density, the lower the soil permeability. 2) In terms of soil scour resistance, the four plots displayed an order of Plot A (2.02 min•g^-1) > Plot C (0.82 min•g^-1) > Plot B (0.43 min•g^-1) > Plot D (0.31 min•g^-1) 3. In terms of soil erosion durability, Plot C was in the lead among the four. 【Conclusion】 After overall evaluations of soil permeability, soil scour resistance and soil erosion durability of the four plots, a conclusion comes as that mixed forest is the most conducive to improvement of soil erosion resistance.