Abstract: Due to the complexity of geological conditions and diversification of mining technology,the impact factors of rock burst are uncertain, and the reasonable weight of the relevant influencing factors can not be determined in the evaluation.In view of this problem,the D-S theory is introduced into the fuzzy comprehensive evaluation method,and the conflict evidence synthesis method is used to eliminate the conflict between the fusion data to determine the index weight.The improved fuzzy comprehensive evaluation method is used to evaluate the risk of rock burst in Xiaoyun Coal Mine,and the evaluation result is safe, which is in line with the actual engineering.The example analysis shows that the D-S theory can better consider the uncertainty of the index in fuzzy comprehensive evaluation and the evaluation result is accurate and reliable with high accuracy and application value.