Based on the geological investigations, formation conditions and features are studied for the debris flow, Then the dynamic parameters such as bulk density, discharge, velocity and transported sediment scale are calculated. The results showed that the debris flow hazard in Darui country belonged to intermediate frequency ranstorm type debris flow. Based on debris flow hazard features and local social, economic situation as well as need of ecological construction, preventive countermeasures for the debris flow hazards being anti bolcking binding are presented.