Pay-off reel brake device

The utility model relates to the technical field of pay-off reels, in particular to a brake device of a pay-off reel, which comprises a roll shaft, a brake disc and a brake caliper component, the diameter of the roll shaft is less than 50mm, the roll shaft is inserted into a shaft hole of the pay-off reel and is locked and fixed by a locking mechanism, and the brake disc is provided with a sleeve and a brake disc body arranged on the outer ring of the sleeve. A locking piece is arranged on the sleeve and used for locking and fixing the sleeve to a roller shaft, the brake caliper assembly is provided with a fixed caliper body and a movable caliper body, the fixed caliper body and the movable caliper body are arranged in a spaced mode, a rotating rod is arranged between the movable caliper body and the fixed caliper body, and the rotating rod drives the movable caliper body to be close to or away from the fixed caliper body when rotating forwards or reversely. When the movable caliper body is close to the fixed