Adjustable supporting device for fabricated steel bar truss floor support plate

The utility model discloses an adjustable supporting device for a fabricated steel bar truss floor support plate, which is characterized in that the steel bar truss floor support plate is mounted on symmetrical I-shaped steel beams of a construction building, two connecting lugs are fixedly connected to two sides of a top support pipe seat, and inclined support rods with adjustable lengths are respectively hinged through the two connecting lugs; the lower ends of the groove-shaped brackets are hinged to straight leg supporting bases fixedly connected with the two ends of a length-adjustable horizontal supporting rod respectively, the right-angle outer side faces of the supporting bases are matched with the upper face of a lower flange plate of the I-shaped steel beam and a web plate, the back faces of the groove-shaped brackets with upward openings are fixedly connected with vertical screw rods, and the vertical screw rods provided with adjusting nuts are matched with pipe holes of jacking pipe seats. And a h