Abstract：In light of the fact that the decision making of treatment schemes of slopes is a comprehensive multi-objective and multi-hierarchical judgment problem，and a fuzzy property of its evaluation indexes is involved，a fuzzy hierarchy analysis on decision making of rockmass slope treatment based on entropy weight is presented in this paper. According to the two-two index comparison，the triangle fuzzy numbers are adopted to establish judgment matrix. Thus the unbalance of judgment matrix caused by traditional hierarchy analysis is improved. The entropy weight is given through fuzzy interval arithmetic based on level sets and optimistic index. Then the treatment schemes of rockmass slope are evaluated on the basis of entropy weight. The assessment of treatment schemes of critical rockmass on the Slate Mountain is taken as an example，and the application of the method is discussed in detail. The result shows that fuzzy analysis hierarchy process of decision making for rockmass slope treatment based on entropy weight is scientific and reasonable，and has important value for engineering application.
