Abstract: Based on the analysis of a great deal of field investigation data,11 factors,which include the landslide itself and controlling measurements,were selected.Then,comparing with the current evaluation methods,fuzzy mathematics is adopted since there were difference and fuzzy about the landslide and the effectiveness of its controlling.Furthermore,according to the affecting degree of the factors,subordinate degree of the 11 factors were described quantitatively or half-quantitatively,and the revising weight determination method of forced decision was proposed.Finally,the post-fuzzy comprehensive evaluation model of effectiveness of landslide control was set up.The model,which had been certified preliminarily,was useful and effective.