The invention discloses a composite-forming ultra-light floor roller. The composite-forming ultra-light floor roller comprises a shaft core and a fiber-woven composite layer. An outer cylinder of the shaft core is covered with the structural-fiber-woven composite layer; the shaft core comprises an outer barrel, an inner barrel and supports; the inner barrel and the outer barrel are homocentric, and the multiple supports are arranged between the inner barrel and the outer barrel and evenly distributed between the inner barrel and the outer barrel in a spiral mode; a composite layer comprises a fiber-woven-structure enhancement layer and a pouring layer; the fiber-woven-structure enhancement layer is covered with the pouring layer, is a sleeve mesh-shaped woven fabric woven with composite materials in a weaving machine and comprises a single or multiple players. The composite-forming ultra-light floor roller has the advantages that the mass is light, the strength is high, the rotational inertia is small, the accuracy of the outer cylinder and the extension strength are high, the floor roller is not deformable and not straightened, the outer layer is not fractured, and the formed floor roller is free of mechanical wave, resistant to static electricity, corrosion and high temperature and long in service life; the making processes are reduced, energy is saved, consumption is reduced, the manufacturing cost and the maintaining cost are low, the parking time is short, and the product quality and the production yield are increased.