Abstract: Disaster source in front of the tunnel face can easily cause the coal mine accidents，resulting in a great threat for the safe production in coal mine.It is of important significance for the advance detection to obtain the information of the disaster source and seam anomalies.This paper introduces the advance detection method and principle based on the geological radar，then a detection application case is conducted in the belt trough reverse-driving-lane of the Changcun coal mine，Lu’an Group.The processed data are interpreted by using the complex technology of the time profile and frequency profile，and the results show that：the geological structure of the side and head face in the reverse-driving-lane is acquired，and the location and depth information of the 6 coal-lithology belt change zones and 2 fracture water areas are determined.