To continuously mold a braiding molding hollow container by putting together a plurality of filaments on an outer periphery of a hollow continuous liner of thermoplastic resin to reduce a weight and cost of an LPG pressure resistant container.

The hollow container forming system comprises a continuous liner molding part for continuously molding a continuous liner 70 for an inside layer 72 of a follow container axially continued through a hollow connecting part 71, a braiding molding part 2 for molding a continuous braiding molding 73 by braiding using braiders BR1, BR2 on an outer periphery of the liner, a cutting part 3 for radially cutting the molding at the connecting part, and a plug welding part 4 for welding a plug 75A to an opening formed by cutting. And, the pressure resistant container is molded by the system.