To manufacture a long size assembled reinforcement of X-shape arrangement in multiple directions using an existing reinforcement basket knitting machine to manufacture parallel assembled reinforcements.

In manufacturing a long size assembled reinforcement of X-shape arrangement in multiple directions using a reinforcement basket knitting machine A provided with a support rod 3 capable of being switched to an expanded condition and a contracted condition relative to a rotary shaft 1, a first ring support device 12 to support an element reinforcement fixing ring 13 and an element reinforcement positioning ring 14 close to each other, a second ring support device 12 to support only the element reinforcement flexing ring, an element reinforcement center fixing frame 15 provided with inner and otter rings located concentric in the same plane, a third ring support device 12 to support only the element reinforcement fixing ring in an attachable/detachable manner, and a forth ring support device 12 to support the element reinforcement fixing ring and the element reinforcement positioning ring close to each other are fixed to the prescribed position of the support rod 3, and the long size assembled reinforcement of X-shape arrangement in multiple directions while preventing the deflection of the element reinforcement.