Abstract: In order to reduce uncertainty caused by expert subjective perception and experience level during construction of important power consumer risk evaluation system, a risk group evaluation method based on cloud model and grey incidence decision-making analysis is proposed. The method converts fuzzy subjective evaluation to interval values using cloud rules in normal Cloud model, and then the risk was evaluated by gray incidence decision-making analysis method. Result comparison with other evaluation method in a specific case shows the validity of proposed method. The research showed that the method could evaluate the important power consumer risk more effectively and objectively.