The series CNC knee-type milling machines, improved on the basis of knee-type milling machine and equipped with CNC , are integrated mechanical and electrical products. Besides the general performance of traditional milling machines, they are also provided with CNC functions. ,so the machining range can be broadened and the working efficiency increased. Equipped with domestic and foreign advanced CNC systems, this series of milling machines are suitable for machining the plane and three-dimensional components of complex-shapes, for instance, all kinds of dies such as punch die, pressing die, forging die and plastic die, etc. and complex-shaped parts of mould board, cam, plane and internal-combustion engine etc. They are widely used in those companies which need to do machining of complex-shaped components of various kinds.