The invention refers to a system for tying and stabilizing a plastic cover film for agricultural crops such as soft fruit covers. Cultivation in covered areas has been particularly developed in recent decades. The state of the art includes glass panes, greenhouses, and special plastic coverings for soft fruit. With the prior art, the placement, fastening and fixing of the plastic film is achieved with ropes or with elastic cords or with soft PVC tubing. However, the cost of binding the plastic film is significant as skilled staff and considerable amounts of man hours are required to tie the plastic film to the supporting structure. Tying the film, in most cases, is carried out by employing knots on simple eyelets or grommets, that the plastic films bear and, respectively, with knots on the wire ropes of the structure.