Slope(landslide)classification is one of the key ways to study the emergency prevention of sudden geological disaster，and is also the basis for adopting the engineering analogy method in preventing the slope(landslide)disaster. So，the existing researches on the slope(landslide)classification method at home and abroad were firstly reviewed，and then the existing slope(landslide)classification methods were divided into four groups according to the classification method and classification purpose. They are the method based on single or multiple factor，the method based on failure mode and countermeasures，the method based on monitoring and early warning，and the method based on stability appraisal. Next，their advantages and disadvantages were reviewed respectively. Finally，according to the urgent demand and classification purpose of the sudden geological disaster，the emergency prevention classification methods for slope(landslide)based on monitoring and early warning and movement distance of the landslide after failure were established respectively on the basis of theprevious researches. Based on the special requirement of the sudden geological disaster emergency prevention，the classification index representing the signs before the disaster was included，which will provide more targeted guidance for emergency prevention of the sudden geological disaster.
