Abstract: Slope debris flow has the characteristics of small scale, wide distribution, sudden outbreak, fast flow, short process and large impact force, which is a very serious natural disaster. To find out the development characteristics of slope debris flow of Nimanong Natural Village in Xietongmen County of Rikaze City of Tibet, the authors in this paper adopted fine field investigation and measurement as working method to find out the characteristics in geological environment , the debris flow area division, main channel and branch lander channel characteristics, the debris flow formation conditions and the debris flow provenance transformation relations. Therefore, the development trend of debris flow was analyzed and the danger area was delimited. The results show that the total amount of loose solid sources in the basin are about 22.72×10⁴ m³, and the kinetic reserves that may be involved in debris flow activities are about 7.82×10⁴ m³. The debris flow disaster at large scale would be induced once the slope debris flow erupted. The comprehensive disaster-causing ability of debris flow is strong, and the disaster-resisting ability of the affected body is poor, which makes the urgency of debris flow treatment to be grade I. Two treatment schemes of “diversion channel + intercepting channel + diversion dike” and “diversion protection dike” are put forward to provide technical support for prevention and controlling of debris flow.