The invention discloses a single-arc groove type end milling cutter. The single-arc groove type end milling cutter comprises a cutter tooth, a milling cutter body, a connecting device, a bolt, cuttingdevices, a cutter head, a cutter handle, a pin opening and a fixing hole. The single-arc groove type end milling cutter has the beneficial effects that the end milling cutter is compact in structuralconnection and easy to use, and the milling cutter body is of a single-arc groove type structure; when a milling process is conducted, a workpiece can be fed in the milling cutter rotating directionor in the direction opposite to the milling cutter rotating direction, the efficiency is high, and the cutter tooth is provided with chip grooves; when the milling cutter is propelled, the situation that the propelling difficulty is increased due to scrap blocking is prevented; the surface of the milling cutter body is coated with a metal layer, the smoothness and cutting precision of the millingcutter body are high, one side of the connecting device is provided with the pin opening, fixing can be achieved through a pin, and the cutter head is fixed to the top of the cutter tooth through thebolt; when sharpness of the cutter head cannot meet the requirement, a new cutter head can be replaced conveniently; and the cutting devices are arranged on the outer side of the cutter head in an array manner, and a cutting sheet is fixedly installed at one end of each cutting device, so that the chip breaking effect can be improved, large-allowance chip cutting efficiency is improved, and the working stability is high.