This paper took the “7·10”super-huge debris flows in Jian River section of Beichuan as the research object, analyzed the disaster types, spatial distribution, disaster characteristics, disaster mode and controlling factors. The results showed that: 1) rich provenance and heavy rainfall were the main causes to the disasters which were characterized by clustered spatial distribution and obvious chain effects, and the scales were mainly small or medium; 2) compared with other regions, debris flows had low densities ranging from 1.69 -1.91 g/ cm³, and they were mainly transitional types. The debris flows also had a significant amplification effect, and the rates of flow were 1.9 - 8.5 times that of pre - earthquake. Finally, given the characteristics and failure mode of disasters, some suggestions are proposed in order to relieve mountain hazards.