To provide a reinforced brush which can improve the uniformity of the density of the bunch of bristles and the polishing property, and further to provide a method of deburring polishing using the same reinforced brush.

In the reinforced brush, a plurality of bristles are tied, and the bunch of the bristles is retained in a cylindrical body formed by a swingable coil spring, and a plurality of the bunches of the bristles are arranged at an arbitrary interval. The bunches of the bristles are retained in an un-crowded state at least at the head portions of the coil springs, and the coil springs are wound so as to form a triangular cross section shape or other polygonal cross section shapes at least at the head portion of the coil springs.