Abstract: Under the circumstance that the acoustic emission has no direct connection with the coal sample, the experiment adopts three methods of connection to improve the accuracy of acoustic emission. We put the experimental equipment developed by Taiyuan University of Technology under the triaxial loading pressure, find the relationship among the acoustic emission event count, axial compressive force and time, and identify the most reasonable method of connection. The conclusion is that the cure of acoustic emission event conforms to the exponential increase under the condition of stepwise loading. At the peak, acoustic emission event count decreases or stays the same. The results of the experiment have an important guiding function and applied value in the engineering stability of coal rock acoustic emission monitoring and prediction.