ROTARY BEVELMENT COMPOSITE SAW BLADE

A design solution of a rotary bevelment composite saw blade and a rotary bevelment composite saw blade for implementing the design solution. The rotary bevelment composite saw blade which comprises an outside saw blade (11) and an inside saw blade (21). The rotation center of the outside saw blade (11) and that of the inside saw blade (21) are coaxial, and the outside saw blade and the inside saw blade are arranged in parallel and have opposite cutting directions. A bearing (5) is arranged between the outside saw blade (11) and the inside saw blade (21). An inside ring of the bearing limits the position of the outside saw blade (11). An outside ring of the bearing limits the position of the inside saw blade (21). The outside saw blade (11) and the inside saw blade (21) rotate freely following the inside ring and the outside ring of the bearing respectively. Friction, interference, and collision are not generated between saw blades of the rotary bevelment composite saw blade, and the rotary bevelment composite saw blade is efficient, stable, and reliable in running, and is suitable for cutting off materials such as metal, stone, wood, and glass.