Fixing device with tightness adjusting function

The utility model discloses a fixing device with a tightness adjusting function, which comprises a strip-shaped plate, clamping rods and an adjusting component, at least five groups of clamping rods are arranged on the strip-shaped plate, and the adjusting component is arranged on the strip-shaped plate; and the adjusting assembly comprises tooth blocks, a mounting groove, a connecting rod and a gear, a plurality of sets of tooth blocks are mounted on one side of the clamping rod, the mounting groove matched with the clamping rod is formed in the strip-shaped plate, the connecting rod is rotationally connected into the mounting groove, and the gear is mounted on the connecting rod. The adjusting assembly and the rotating rod drive the worm to rotate, the worm is meshed with the worm wheel to drive the worm wheel to rotate, the worm wheel rotates to drive the connecting rod to rotate, the connecting rod rotates the gear to rotate together, the gear is meshed with the tooth block to drive the clamping rod to mo