The utility model discloses a fixing buckle, which comprises a BluTack adhesive body and an insulating bag frame, wherein the BluTack adhesive body has a cylindrical structure; the insulating bag frame is wrapped on the side surface of the BluTack adhesive body, and the insulating bag frame has a closed annular structure; the end portion of the BluTack adhesive body extends out of the insulating bag frame. When using the fixing buckle, one end of the BluTack adhesive body is bonded with a flat plate and the other end is bonded with a piece of paper. According to the fixing buckle provided by the utility model, the two ends of the BluTack adhesive body can be bonded with the flat plate and the paper respectively; compared with fixing buckles that fix the paper onto the flat plate by magnetic force in the prior art, the fixing buckle provided by the utility model not only can fix the paper onto the flat plate made of iron, but also can fix the paper onto a flat plate that is not made of iron; and the application scope is wide, the usage is more convenient.