The utility model discloses a leading geology predictor, including audio receiver, AD converter, master controller and memory, the top of box is equipped with the case lid, the probe is connected with the audio frequency ware, the signalling end of probe is equipped with synchronization signal wave detector and reflected signal wave detector, the signal output part of synchronization signal wave detector and reflected signal wave detector is equipped with the wave filter, the wave filter is connected with audio receiver, be equipped with the AD converter between audio receiver and the master controller, the master controller is connected with the display screen. This leading geology predictor is provided with the wave filter in signal feedback circuit, improved this leading geology predictor's interference killing feature, makes the signal intensity who obtains improve, and the fidelity is high, effectively overcomes lower, the difficult defect of holding of detection process of detection precision that current leading geology forecast system exists.