Velcro with adjustable width

A width-adjustable magic tape comprises a tape body, a first bonding face and a second bonding face are arranged on the front face of the tape body, two sides of the first bonding face of the tape body are respectively provided with a broadband, the two broadband are respectively and transversely provided with a transverse opening, a square first connecting buckle and a square second connecting buckle are arranged on the two transverse openings in a penetrating mode, and the two broadband are folded on the first bonding face of the tape body. A third bonding face is arranged on the outer side face of each widened belt, matched zipper tooth belts are arranged along the two widened belts, the two zipper tooth belts are connected with each other through zipper heads, and the second connecting buckles are movably connected to the zipper heads. In the overlapping state of the broadband, the fourth bonding surface and the first bonding surface are bonded and matched, and the bonded zipper tooth belts and the second