The invention discloses a metal cutting circular sawing machine tool rest system which comprises a hexagon socket screw, a saw blade, a nut, a gasket, a right protective cover, a chip removal device, symmetric blocks, oil holes, oil pipes, a left protective cover and a rotating shaft. The left protective cover and the right protective cover are connected through the rotating shaft. The saw blade is fixed to the right protective cover through the gasket and the nut. The three symmetric blocks are fixed to the left protective cover through the hexagon socket screw and provided with the oil holes. The oil pipes are fixed to the left protective cover and the right protective cover and connected with the oil holes. A groove is formed in the lower portion of the left protective cover. The chip removal device is clamped in the groove in the lower portion of the left protective cover. Finally, the left protective cover and the right protective cover are folded together and fixed together through the hexagon socket screw. The metal cutting circular sawing machine tool rest system is high in production efficiency, easy to operate and suitable for workpieces of different sizes and types; the design that an external protective cover is improved into the symmetric blocks is adopted, stability of the saw blade is greatly improved, sawing accuracy is improved, and meanwhile the service life of the saw blade is prolonged.