Abstract: Based on virtual prototyping technology，the six-degrees of freedom Articulated Coordinate Measuring Machine（A-CMM） is investigated，and the measure space of the A-CMM is analyzed and simulated.The kinematics equation and the kinematics virtual prototyping model of the A-CMM are established.And then using some special posture and position pictures to identify virtual prototyping model，and compared the data from the virtual prototyping model and kinematics equation to verify the accuracy of the model.Results show that the model can accurately reflect the position and orientation of the probe，and thus facilitate the effective motion simulation in the entire measure space.The correct virtual prototyping model and the right kinematics equation are the base for the further research of position error distribution of the probe in the whole measure space.