Taking Huang village of Wuyishan town in Tongmuguan basin of Yanshan county as the evaluation object,based on the household investigation on the spot and the measured river cross-section data,the relationship between water level and discharge is ascertained.And combined with the investigation condition on the spot and mountain torrent disaster history and based on the control cross-section landform of Huang village and house distribution condition of two side of Tongmuguan River,the disaster water level was determined.The corresponding frequency of the corresponding flood peak discharge on the disaster water level reflects the flood control capacity.Finally,dangerous scope and dangerous grade of Huang village are determined.The dangerous area and the personnel transfer route map are drawn.