The invention discloses a mine rock burst intensity prediction method and device, and the method comprises the following steps: determining the mining accumulation energy UT-D of a coal body based onthe total energy of mining coal and the damage energy consumption of the coal body under the mining condition; determining critical energy UL of the rock burst based on the coal body damage loss energy and the broken coal body throwing energy; accumulated energy UT-based on mining And D and the critical energy UL, predicting the intensity of the rock burst.