Abstract: The analysis of geomorphic and erosion process of Hengshan Mountain shows that the topographic feature is the basic factor impacting on soil erosion. Antiquity erosion topographic feature is the base of current topographic course, and decides the developing law of current soil erosion. Human activity cannot transform this law, but can affect the progress of soil erosion, and soil erosion can make the current geomorphic course accelerate. This acceleration reacts soil erosion intensity and pattern. Distinction from the antiquity and current soil erosion, normal and accelerating soil erosion using long time dimension will be beneficial to supervise the current geomorphic process and adopt more justified methods of soil reservation, to prevent accelerating soil erosion and retard current soil erosion process, then protect environment and scenery.