The utility model relates to a nylon clamping slide fastener without core, which comprises a continuous repeatedly coiling single fastener(11) in the circle shape, a continuous repeatedly coiling single fastener(21) with the same structure as the single fastener(11), wherein, the single fastener(11) comprises a plurality of chain teeth(1) with the same structure, and the single fastener(21) comprises a plurality of chain teeth(2) with the same structure. The utility model is characterized in that: the middle parts of the circles above the chain teeth(2) and the chain teeth(1) are all provided with a groove(111) and(211). In order to make the fastener bars of the slide fastener be unlikely to be distorted caused by squeezing, and the middle parts of the circles under the chain teeth(2) and the chain teeth(1) are all pressed flat to form a flat wide edge(112) and(212), thereby the shape of the single fastener is very easy for keeping.