Abstract: The concealed faults in 61101 first coalface of Tangjiahui coal mine in Zhungeer coalfield were probed by using YDT175 type radio wave perspective instrument with 310 kHz as the working frequency, and by taking appropriate anti-jamming methods. The experimental data was processed and displayed by using composite curve method and the CT imaging method. The result shows that there are three high absorption and attenuation bands at 770~1 370 m of 61101 coal face gateway, and these high absorption and attenuation bands were interpreted as faults, They have been verified by the existing geological data and the actual exposure to the roadway that three normal faults exist in three high attenuation bands. These facts illustrate that selecting the appropriate radio waves perspective frequency can reliably detect the hidden geological abnormal body, radio wave perspective method is the effective technology to ensure the face mining in safety and high efficiency.