Abstract: Fujiang River upstream is typical of high ridge and narrow valley physiography, which results in its contradictory between people and land. Therefore, the land after debris flow disasteris the main living place for local residents. Through field survey, we found the current development tendency of the debris flow disaster landis mainly depositing.The extent of deposition fan reached 58 percent and the distance from debris flow disaster land to the river ranges from 100 to 350 meters. The debris flow disaster land has good hydrothermal condition. Based on the difference of  debris flow depth and the discharge under designed rainfall frequencies, we set up a method to determine the deposition hazard range of debris flow disaster landin Fujiang River upstream. The deposition scopes under different rainfall frequencies with 20 years return period,50 years return period and 100 years return period were calculate as 0.167 km2, 0.292 km2 and 0.420 km2, respectively. It will be benefitfor building debris flow disaster evaluation method based on land utilization and disaster risk in advance.