The analysis of energy conversion during the set-out process of seismic landslide is very important for the late landslide kinetic theoretical studies. Because the analysis impacted by many complex influencing factors is fuzzy

there is no accurate quantitative calculation formula for energy conversion rate. Fortunately

the fuzzy synthetic evaluation method has obvious advantage in the analysis of fuzzy problems

which can take various complex factors into account to make an overall assessment. Therefore

the method can be adopted to determine the grade of energy conversion rate. After analyzing the effect of every factor on the energy conversion rate in detail

seven factors

such as seismic acceleration

structure of rock mass

characteristics of controlling structural planes

integrity of rock mass

stratum lithology

groundwater

and angle between the unfavourable interfaces and free surface

are selected as the major factors. Using fuzzy analytic hierarchy process

the important degree of the above factors characterized by the influencing weight is obtained. And the logic classification method is adopted to determine the membership function. On this basis

the fuzzy synthetic evaluation is then used to draw the grade of energy conversion rate with its value determined semi-quantitatively. The proposed method is applied to study the Donghekou earthquake-induced landslide; and the obtained results meet the objective reality

so as to indicate that the method is scientific and feasible. Consequently

it can be used for reference in other similar theoretical researches.