The object of the invention is a method of manufacturing, by friction spinning, a reinforcing thread (1) for fabric covering or a technical textile intended to be incorporated in a textile base, in which: the spinning machine (7) is supplied with a core thread (2); the spinning machine (7) is supplied simultaneously with a sliver (9) of fibers (3, 4), the said fibers (3, 4) being individualized and then associated with the said core thread (2); in which the sliver (9) of fibers is formed from a mixture of hot-melt fibers (3) and high melting point fibers (4).