The invention discloses a high-speed AC five-axis linkage double swing head, and relates to the technical field of milling machine accessories. The high-speed AC five-axis linkage double swing head comprises a C-axis motor, an A-axis motor and an electric main shaft, wherein a C-axis speed reducer is arranged at one end of an output shaft of the C-axis motor, a C-axis connecting disc is arranged on one surface of the C-axis speed reducer, a main body is arranged on one surface of an output port of the C-axis speed reducer, and a main body left side protection cover is arranged on one side faceof the main body. According to the high-speed AC five-axis linkage double swing head, A-axis speed reducer fixing nuts are loosened, four left-hand nuts are used for adjusting the A axis, and therefore the A axis is parallel to the Z axis of a machine tool; the A-axis fixing nuts are strengthened, errors generated in the installation and production process are avoided, the working efficiency andthe production machining accuracy are improved, the production cost is reduced, the manual input is reduced, the production cycle is shortened, and the high-speed AC five-axis linkage double swing head can be widely applied to numerically-controlled machine tools in multiple fields such as molds, aviation, spaceflight, high-speed trains, war industry, scientific research, teaching, medical treatment and shipping.