High-hardness alloy end mill convenient to mount and fix

The utility model discloses a high-hardness alloy end milling cutter convenient to install and fix. The high-hardness alloy end milling cutter comprises a cutter head, a locking hole, a locking screw, a butt joint hole, a butt joint rod, a clamping block, a supporting rod and a clamping plate. The end mill has the beneficial effects that a workpiece is milled through an integral structure formed by the tool bit and the blade in the end mill, and during milling, if the tool bit needs to be replaced, the tool bit is butted through the clamping block and the limiting groove, so that the butting rod is limited and slides to a specified position, and then the tool bit is replaced. By arranging the limiting structure and the locking structure, the tool bit can be quickly disassembled and locked, limiting can be conducted during locking, the situation that the position between the tool bit and the locking screw needs to be adjusted is avoided, the quick mounting and fixing effect is achieved, and the working efficie