The effectiveness evaluation of emergency repair on equipment plays an important role in repair force construction and repair decision-making.Aiming at the uncertainty and randomness of qualitative index quantification,based on the uncertainty quantification method and cloud model,an effectiveness evaluation model of emergency repair on equipment is proposed.The feasibility of the model is verified through an example.Based on the evaluation results,the advantages and disadvantages of the repair capacity building are analyzed,and the methods to strengthen the emergency repair efficiency are presented. The evaluation model provides method basis and technical support for comprehensively improving the building capacity of the emergency repair.