Vacuum bag reusing structure

The invention relates to a vacuum bag reusing structure, and belongs to the field of composite material preparation. The structure comprises a putty strip, a die and a vacuum bag, and further comprises a self-adhesive reinforcing strip. The self-adhesive reinforcing strip is bonded outside the vacuum bag, and the arrangement direction of the self-adhesive reinforcing strip is consistent with the arrangement direction of the putty strip in a matched mode. By means of the structure, the vacuum bag can be reused without affecting sealing, and the self-adhesive reinforcing strip can enhance the strength of the vacuum bag and cannot be twisted and deformed through the vacuum bag, so that the bonding relation between the putty strip and the vacuum bag is affected indirectly; after the vacuum bag is used, the putty strip can be torn off along with the vacuum bag even if the environment is complex, and the technical effect that the self-adhesive reinforcing strip affects the putty strip and the vacuum bag is unexpected; the vacuum bag can be reused, the production cost in the composite material forming process can be saved, the pollution to the environment in the waste and old vacuum bag reusing process can be reduced, and the environment is protected.