The invention discloses a preparation 
system of quick 
numerical control machining of complex parts of an 
airplane and a method. The 
system takes the existing CAD / 
CAM system as a platform, and comprises a technology resource and 
knowledge base management module, a quick blank generation module, a part classification and technical scheme analysis module, an 
automatic programming module, a quick tool generation module, a strain analysis and 
deformation control module, a front and rear 
process module and a technology data generation module. The system is built on the basis of a three-dimensional numeric part model, systematically and exactly embodies a specialized flow path for supporting the 
numerical control machining technology preparing and the 
programming of the complex parts of the 
airplane, can greatly reduce man-
machine interaction operation required by preparing technology and 
programming, effectively solves the problems of the unstable programmed procedure and the unreasonable scheme design of the 
machining technology caused by the lack of the experience of process operators, and the like, can effectively control the deformation quantity during and after machining the parts, can obviously improve the efficiency and the quality of the 
numerical control machining preparing and the 
programming, and improves the professional level and the intelligence level of the CAD / 
CAM system.