Intuitionistic trapezoidal fuzzy number is used to represent the experts’ evaluation information, and a new
method of multi-attribute group decision is proposed. The expectation and expectant score, ordered weighted aggregation operator and hybrid aggregation operator for intuitionistic trapezoidal fuzzy numbers are defined. The model of multi-attribute group decision is constructed based on intuitionistic trapezoidal fuzzy number. The group overall evaluation values of the alternatives are obtained by the hybrid aggregation operator. The results of group decision making are presented according to the expectation and expectant score. The example analysis shows the effectiveness of the method.