Abstract: The uniaxial compression model of coal-rock is built by means of micro particle flow PFC^2D software platform, and the influence of different loading speed on the acoustic emission characteristics of coal-rock damage evolution is simulated. Analysis results show that the loading rate has little effect on the acoustic emission law of coal-rock damage evolution, but with the increase of the loading rate, the occurrence time of the acoustic emission will be advanced; the increase of the loading rate has no effect on the initial emission damage strain of the coal-rock, but the strong acoustic emission strain range raised. The higher the loading speed, the more deformation energy accumulation, the higher the damage degree of coal-rock and the more the total number of the acoustic emission.