Method for packaging punnets of fruit and vegetable products in a tubular net wrapping, comprising the steps of: a. closing by means of welding a front end of a tract of tubular net; b. attaching to said front end of said tract of tubular net, at the zone of closing by means of welding, at least one ribbon of thermoplastic material, extending longitudinally with respect to the said tract of tubular net; c. feeding the punnet of fruit and vegetable products to be packaged inside said tract of tubular net, until it reaches said front end of the tract of tubular net closed by means of welding; d. prearranging closing means (40, 50) at a closing station placed at the rear part of said punnet fed inside said tract of tubular net, said closing means (40, 50) comprising a first closing unit and a second closing unit, respectively upper and lower, mobile relative to each other, with an alternated motion of reciprocal approach and departing, on a plane transverse to the longitudinal axis of said tubular net, said first closing unit and second closing unit respectively comprising a couple of blades (43, 53) placed beside, suitable to act as a guillotine to tighten said portion of tubular net; e. operating said closing means (40, 50) to tighten said tract of tubular net and said ribbon of thermoplastic material in a position rear to said punnet; f. performing the displacement in the same direction of said punnet fed inside said tract of tubular net and of said closing means (40, 50) tightening said tract of tubular net and said ribbon of thermoplastic material, from said closing station to a release station for the packaged punnet; g. performing, during said displacement step, the welding of said tract of tubular net and of said ribbon of thermoplastic material tightened by said closing means (40, 50); h. in the meantime, performing the cut of said tract of tubular net and of said ribbon of thermoplastic material at the rear welding zone to separate said packaged punnet; i. during said displacement step, performing the displacement of a sealing member of the said closing means (40, 50) into a lifted disengagement position, maintaining closed said blades (43, 53) of the said closing means (40, 50), said sealing member being mobile on said first closing unit, upon control of actuator means, between a non operating position and an active position wherein the sealing member is brought in abutment of an abutment member associated with said second closing unit; j. performing the reciprocal departing of the said closing means (40, 50) so as to free the sealed portion of the said tubular net and of the said ribbon from the tightening of said blades (43, 53). a. closing by means of welding a front end of a tract of tubular net; b. attaching to said front end of said tract of tubular net, at the zone of closing by means of welding, at least one ribbon of thermoplastic material, extending longitudinally with respect to the said tract of tubular net; c. feeding the punnet of fruit and vegetable products to be packaged inside said tract of tubular net, until it reaches said front end of the tract of tubular net closed by means of welding; d. prearranging closing means (40, 50) at a closing station placed at the rear part of said punnet fed inside said tract of tubular net, said closing means (40, 50) comprising a first closing unit and a second closing unit, respectively upper and lower, mobile relative to each other, with an alternated motion of reciprocal approach and departing, on a plane transverse to the longitudinal axis of said tubular net, said first closing unit and second closing unit respectively comprising a couple of blades (43, 53) placed beside, suitable to act as a guillotine to tighten said portion of tubular net; e. operating said closing means (40, 50) to tighten said tract of tubular net and said ribbon of thermoplastic material in a position rear to said punnet; f. performing the displacement in the same direction of said punnet fed inside said tract of tubular net and of said closing means (40, 50) tightening said tract of tubular net and said ribbon of thermoplastic material, from said closing station to a release station for the packaged punnet; g. performing, during said displacement step, the welding of said tract of tubular net and of said ribbon of thermoplastic material tightened by said closing means (40, 50); h. in the meantime, performing the cut of said tract of tubular net and of said ribbon of thermoplastic material at the rear welding zone to separate said packaged punnet; i. during said displacement step, performing the displacement of a sealing member of the said closing means (40, 50) into a lifted disengagement position, maintaining closed said blades (43, 53) of the said closing means (40, 50), said sealing member being mobile on said first closing unit, upon control of actuator means, between a non operating position and an active position wherein the sealing member is brought in abutment of an abutment member associated with said second closing unit; j. performing the reciprocal departing of the said closing means (40, 50) so as to free the sealed portion of the said tubular net and of the said ribbon from the tightening of said blades (43, 53).