[Objective] To Study the damage types and hazard effects from freezing-thawing process and the mechanism of geo-hazards/soil erosion in plateau of Western Sichuan Province.[Methods] On the basis of the specific survey of geological hazards in Daofu County of the plateau of Western Sichuan Province, the hazard effects of freezing and thawing were analyzed and summarized, and different damage types were counted.[Results] We put forward several damage effects as the "peeling effect" of freezing-thawing,the "surface effect" of landslide and the "fragmentation effect" of debris flow source. The carried stones of debris flow were less than 1 m in diameter. Therefore, burying was the main damage type of debris flow. More than 70% of landslides had the depth less than 20 m, the volume of these landslides were relative smaller, and the potential hazards from landslide is lower.[Conclusion] The damage power from debris flow in the plateau of Western Sichuan Province is weak, the prevention engineering should be consider as drainage oriented types. The landslide in the plateau of Western Sichuan Province had small volume, and this type landslide can slide easily under the lubrication of snow melt water or rainfall, and keep the slope flow away from landslide is important to the stability of this type of landslide.