The Rock-art Protection Zone of Helan Mountains is the Chinese culture and art treasures for thousands of years. It is located on both the pluvial fan and the ent rance of Helan Valley, a typical debris flow valley in Helan Mountains, and is of ten damaged by debris flow. Based on both the environmental background of Helan Valley and the feature analysis of debris flow ravine, some suggestions are put out to solve the problems of debris flow to the Helan Rock-art and ancient village relics. The suggestions are the combination of hazard defense and partition governance, the integration of project arrangement and biological measures, and the cooperation of disaster reduction and emergency system.