A component-based model integration framework for computer numerical control system design and development is presented.The model integrates modeling,simulation,verification and implementation in a uniform environment.The computer numerical control(CNC) modeling language with well defined syntax and unambiguous semantics is developed.Using the proposed CNC model integration method,a three axis milling system model is developed in the case study.The approach is an attempt to create an infrastructure to support the CNC system design in an efficient way,while at the same time guarantees the function and performance requirements with advanced capability of the system such as modularity,flexibility,reusability,etc. A component-based model integration framework for computer numerical control system design and development is presented. The model integrates modeling, simulation, verification and implementation in a uniform environment. The computer numerical control (CNC) modeling language with well defined syntax and unambiguous semantics is developed. Using the proposed CNC model integration method, a three-axis milling system model is developed in the case study. approach is an attempt to create an infrastructure to support the CNC system design in an efficient way, while at the same time guarantees the function and performance requirements with advanced capability of the system such as modularity, flexibility, reusability, etc