Blade is an important component of aeroengine.Because the surface shape of the blade is mostly complex space surface, it is required the blade has good mechanical properties, high surface quality and size precision. In order to solve the problem of difficult manufacturing and processing of blades,taking an aero engine blade as the example, the forging process of the blade was analyzed, nomargin precision forging process was used to process the blade . UG software was used to design the 3D model of the blade; the Mold Wizard module was used to design the blade die;UG_CAM module was used to complete the NC machining of blade die.After optimizing the machining process parameters and cutting path,UG software simulation and postprocessing were used to generate reasonable cutting path to produce qualified blade die.Production practice proves that the blade forged by this die has good quality, high production efficiency. It is suitable for mass production.