Abstract: With regard to the problem of determining attribute weights in multiple decision making，in which the attribute values are in form of intuitionistic fuzzy number，a new method is proposed to determine entropy weights of intuitionistic fuzzy number.According to the traditional concept of entropy weights，a formula is used to get entropy for intuitionistic fuzzy number and then the attribute entropy is obtained by a formula.And the attribute weights are determined on the basis of traditional formula of entropy weights.Furthermore，score function is used to get the priorities of alternatives.Finally，an example is used to illustrate the feasibility and effectiveness of the proposed approach.