Based on using remote sensing technique to study in detail geological hazard dominated by the mud-rock flow in the mountains area of Hebei Province, the method of multi-factor comprehensive judgment is used for the development degree divisions of geological hazard in this paper. In the meantime, some important geological hazard areas to be monitored and controlled are delimited. This result provides a scientific basis for the surveillance and control of geological hazard in order to reduce the damage caused by disaster and provide disaster relief etc., this result has great practical value.