In order to scientifically evaluate the heat hazard in mine shafts,make heat hazard management more targeted,the influence factors of heat hazard in mine shafts are studied and analyzed,and the secondary heat hazard assessment index system is constructed based on this;the IOWA operator improved AHP is used to determine the weight of each index of the assessment system,so as to reduce the subjective deviation of assessment;finally,the cloud model theory combined with the weight of each index is used to evaluate the heat hazard in mine shafts,so that the final heat hazard level in mine shafts and its influencing factors are obtained.Verification in the case study of Jinqu Gold Mine shows that the results obtained by using this assessment system are scientific and reasonable,which can be used as reference for heat hazard in mine shafts.