Abstract: To make effective measures to prevent accidents and reduce casualties, it is important for us to find out the law of the death toll in coal mining accidents and predict the number of deaths effectively. Based on the data on death number in coal mining accidents from 2008 to 2013, this paper predicts the death in 2014 by using unbiased grey Markov model. The results show that the relative error between the prediction results and the actual data is only 1.92%. Finally, the model was used to predict the coal mine deaths in 2015, and the final prediction result was 663. The result is consistent with the development trend of China's coal mines.