The rock burst is a kind of common geological disaster in deep underground engineering and severely threatens the safety of workers and the equipments. Hence, it is necessary to predict the intensity of rock burst. The paper chose the ratio of the maximum rock tangential stress to the compressive rock strength σθ/σc, the ratio of the compressive rock strength to the tensile rock strength σc/σt and the elastic energy index as the criteria indexes of rock burst intensity,and established a forecast model of rock burst occurrence and its intensity of equivalent numerical method according to classification standard of rock burst intensity proposed by Wang Yuanhan. The model is tested by 12 cases of rock project at home and abroad. The results show that the prediction result of rock burst intensity line up perfectly with the practical records. Comparison with other predict models,the proposed model is very simple and convenient for practical use.