Abstract: The strong echoes of rebar could seriously affect the disaster target detection, which brought great difficulties to the disaster target detection in the reber-reinforced zone. A new method of disaster detection for rebar-reinforced zone in runways was proposed in this paper. Firstly, time variant gain and segment equalization were proposed to suppress the strongest reflection echoes of the first layer and the complex multiple reflection echoes of the other layers; and then, a new method of disaster target detection with S transform both in time-frequency dimension and time-distance dimension was proposed, which could be applied to the disaster target with small thickness and small volume; meanwhile, the method could directly display the space position of disaster targets in the runways. The method of disaster detection proposed in this paper is intuitive, easy to operate and has fast processing speed. The simulation results demonstrate the validity of the method proposed in this paper.