Fire scene sample collection device

The invention relates to the technical field of sample collection, and discloses a fire scene sample collection device which comprises a box body, two supporting rods are fixedly connected to the bottoms of the outer walls of the two sides of the box body, a rotating sleeve is rotationally connected between the two supporting rods, the two ends of the rotating sleeve are sleeved with torsion springs, and a cover plate is fixedly connected to the outer wall of the rotating sleeve; the bottom of the box body is covered with the cover plate, an inverted-U-shaped plate is slidably connected between the inner walls of the two sides of the box body, a connecting plate is slidably connected between the inner walls of the two sides of the inverted-U-shaped plate, a plurality of connecting rods are fixedly connected to the bottom of the connecting plate, a supporting plate is fixedly connected to the bottom ends of the connecting rods, and a sliding hole is formed in the top of the supporting plate. Two sliding blocks