Film fixing and supporting device capable of conveniently adjusting spacing

The film fixing and supporting device comprises a supporting rod, supporting bases and an adjusting device, the supporting bases are installed on the two sides of the upper surface of the adjusting device in a sliding mode, and the bottoms of the two ends of the supporting rod are inserted into the top ends of the supporting bases. A supporting frame is fixedly installed in the supporting base, connecting devices are fixedly installed on the outer surfaces of the two sides of the middle of the supporting frame, a sleeve is fixedly installed in the center of the interior of the supporting frame, connecting plates are symmetrically welded to the outer surface of the sleeve, and U-shaped grooves are welded to the bottom ends of the connecting plates. Rolling wheels are symmetrically and rotationally installed on the outer surfaces of the two ends of the two sides of the U-shaped groove, and a clamping groove is fixedly formed in the connecting device. By controlling the rotation of the threaded rod, the supporti