Searching and drilling method for abandoned roadway

The invention discloses a search drilling method for an abandoned roadway. The search drilling method specifically comprises the following steps that 1, the vertical layer position and the rough distribution area of the abandoned roadway are judged; 2, preliminarily depicting a possible distribution area of the abandoned roadway; 3, further exploring and judging a plane area and a vertical layer position of the abandoned roadway; 4, drilling is conducted; 5, the abnormal condition in the drilling direction is dynamically monitored, and the drilling work track is dynamically optimized; and 6, when the abandoned roadway is drilled, drilling is completed. According to the abandoned roadway searching and drilling method, the layer position of the abandoned roadway is preliminarily judged, the distribution area of the abandoned roadway is further determined in combination with a high-density electrical method exploration method and an inter-hole seismic wave CT method, and the drilling track is dynamically correct