Abstract: Aiming at the uncertainty and fuzziness of the factors affecting the stability of surrounding rock, based on the cloud model, a stability evaluation model considering various geological and hydrological factors is established based on the entropy weight method, and the classification of surrounding rock stability is realized. The method uses the entropy weight method to calculate the weights of each index in the classification model, and combines the cloud theory and the classification criteria of each factor of rock stability into a mathematical model. This method is used to establish a 5-dimensional cloud model, and the classification data of the surrounding rock samples are calculated and compared. The actual classification results of the evaluation results are compared. The results show the accuracy and ease of application of the evaluation model in the classification of surrounding rock stability.