Abstract: It is common knowledge that geomorphological evolutionary process is controlled by two processes, endogenic forces process and exogenic forces process. Endogenic force sare from the interier of the solid erath, while exogenic forces are from atmosphere and hydrosphere. the geomorphological evolutionary process is affected by exogenic forces, such as wind, flowing water and glacier, and endogenic forces work simultaneously. All kinds of landform are the instantaneous results of antagonistic action of endogenic and exogenic forces. comparing with geomorphological evolutionary history, human history is a very short instance, But people have to undertake cultivation, animal husbandry and other productive activities for their living since they came to the world, this affects the geomorphological evolutionary process. Especially, the effect of human activity on geomorphological evolution is becoming more and more violent for several thousand years. the authors have studied soil erosional process as a example, and analyzed the effect of human activity on soil erosin. thus the position and effect of human activith on geomorphological evolution have been shown from one point.