The invention discloses a high-speed high-strength cutting tool, relating to a machining tool. The tool has a tool body and a tool head fixed on the front end of the tool body. A circular arc groove is formed on the front tool face of the tool head, and a 150-170 degrees sharp-angled front tool face is formed by sharpening the central position of a main cutting edge at the intersection of the front tool face and the rear tool face of the tool head to form the main cutting edge as a stereoscopic cutting edge. According to the invention, automation is easily realized, vibration is prevented, cutting is stable, tool offset is prevented, turnings discharge is smooth, no turnings clogging or tool breaking is likely to occur, edge sharpening is simple, operation is convenient, no offset cutter is required, raw materials are saved, and high-speed cut-off can be carried out on a workpiece with relatively large diameter to improve production efficiency.