The invention discloses a high-accuracy grinding machine tool with bi-metal saw blades. The machine tool comprises a grinding head mechanism, a workbench, a tooth-dividing grinding mechanism, a tooth sawing mechanism, a positioning mechanism and a clamping mechanism, wherein the grinding head mechanism and the workbench are respectively mounted on an electronic control cabinet and a base in a connecting mode; the tooth-dividing grinding mechanism and the tooth sawing mechanism are both connected with the workbench and are mounted inside a main body frame; the positioning mechanism and the clamping mechanism are both mounted on the tooth-dividing grinding mechanism in a connecting mode; and sand wheels of the grinding head mechanism, the tooth sawing mechanism, the positioning mechanism and the clamping mechanism are all opposite to working positions of saw blades. By adopting the high-accuracy grinding machine tool with the bi-metal saw blades, the problems that the grinding effect is poor because of no consideration of variational teeth and dividing teeth and cracking of teeth in the grinding process of the bi-metal saw blades are solved, the grinding efficiency is improved, the service life of the saw blades is extended, the production cost is reduced, and the machine tool is suitable for grinding the bi-metal saw blades with various kinds of structures.