The NC machining is the most important processing method for the blisk of aero-engine. The NC machining process is an important step to ensure that the geometric precision of the blisk meets the design requirements. According to the design of three-dimension digital model, the shape of the blade after finish milling can meet the dimensional tolerance of the drawing, but the flow-up blade surface finishing and strengthening process have different degrees of infullence on the character of the blade shape of the blisk, resulting in final geometric dimensions of the blade shape beyond design requirements. By analyzing the surface finishing and strengthening process such as polishing process,  vibratory finishing process, shot peening process, the paper determine its influence law and magnitude on the blade shape parameter, then according to the pre-deformed control technology, revise the machining model and program of the finishing process, allowing the blade to obtain the shape and position opposite to the deformation law of the subsequent surface finishing and strengthening process after finishing milling. At last, eliminate these pre-deformations in subsequent processing to achieve the goal of obtaining a qualified blisk in the delivery state.