The plastic tie includes a belt body, which is characterized in that more than one section of spine strip is arranged on the belt body, one end of the belt body is provided with an opening that can be inserted at the other end of the belt body, and the outlet of the opening is provided with a bayonet matched with the spine strip that can only be inserted into the belt body and can not be pulled out. Since the length of the belt body can be changed, articles of different diameters or sizes can be bound. The utility model has the advantages of convenient use and simple structure. The advantages are: 1. The tail end of the tie belt is provided with cross teeth for anti-skid, which is easy to install and pick up. 2. The surface of the tie and lock head is smooth, without obvious burr residue, and it is not easy to scratch the skin. 3. The tie belt is pressed by high technology, the gear is clear, the toughness is strong, it is not easy to loosen, slide and break when stuck. 4. Thickened buckle, thickened internal position, uniform and tight, strong biting force. 5. The tighter the tie, the smaller the tie. The humanized stop design prevents items from falling.