There are over 30 debris flow gullies in Jiuzhaiguo Valley. In recent years, the active debris flows often hurt scencic spots, block the traffic and harm and kill tourists. Debris flow control project was carried out from 1985 to 1997. Fourteen debris flow gullies had been put under control, which resulted in the effective protection of ecological environment, scenic spots, roads and tourists. The tourism and economy are developed smoothly under the new safe circumstance.