Automatic drilling device for underground coal mine

The utility model is suitable for the technical field of coal mining, and provides a coal mine underground automatic drilling device which comprises a bottom plate, a fixing frame, a drilling assembly, an elastic balance assembly and an adjusting assembly, and the drilling assembly is installed on the fixing frame; the elastic balance assembly is arranged on the fixing frame, matched with the drilling assembly and used for enabling the drilling assembly to stably operate in the working process. The adjusting assembly is installed on the bottom plate, the top end of the adjusting assembly is hinged to the fixing frame, and the adjusting assembly is used for adjusting the height and the inclination angle of the fixing frame. In the using process of the device, the height and the inclination angle of drilling equipment can be adjusted, the blocking situation existing in the drilling process is effectively avoided, materials falling during drilling can be guided out in time, and follow-up cleaning is facilitated.