The invention relates to an FOD (Foreign Object Debris) detection radar which comprises a base, a connecting sleeve, a supporting table, a signal receiving antenna and a signal transmitting antenna, wherein the base is arranged in an accommodating groove; the connecting sleeve is vertically arranged on the upper surface of the base, a rotating shaft is arranged on the inner side, and the lower endof the rotating shaft extends into the inner side of the base through a connecting hole; the supporting table is erected at the opening end of the connecting sleeve, the bottom surface is connected with the upper end of the rotating shaft, a detection opening is formed in one surface facing to an airport runway, a supporting plate is connected with the inside of the detection opening, a supporting beam is convexly arranged on one surface, corresponding to the detection opening, of the supporting plate, and a plurality of supporting openings are formed in the surface of the supporting plate positioned under the supporting beam; the signal receiving antenna is erected at one end of the upper surface of the supporting beam; the signal transmitting antenna is erected at the other end of the upper surface of the supporting beam. The FOD detection radar provided by the invention has the benefits that as the signal receiving antenna and the signal transmitting antenna are placed in a mannerof left and right arrangement in the horizontal direction, the central position of an entire radiation port is lifted, and the interference from the ground is reduced, so that the signal attenuation is weakened, and the full coverage of the runway by the system is maintained.