Abstract: The paper analyzed the development status of the coal- rock interface recognition technology and a coal- rock interface auxiliary recognition method wit h the cutting vibration signals of the coal shearer drums was provided. A stress analysis was conducted on the cutting drum of the coal shearer. A cutting vibration mode I of the ranging arm was established. The feasibility of the method was obtained from the theoretical analysis. A simulated cutting vibration test experiment device of the coal shearer was designed, two different property materials were cut by the device and the feasibility of the vibration signals applied to coal- rock interface recognition was verified. The theoretical analysis and the experiment results showed that the vibration signals could be applied to the coal- rock interface auxiliary recognition. The analysis on the experiment results showed that there was difference between the experiment and the real performances possibly and improved proposal was provided.