Aiming at the problems of low positioning accuracy, poor assembly stability and low efficiency caused by manual operation during the assembly process of aeroengine turbine shaft and shaft disk docking, a set of closedloop CNC system integrating measurement, attitude adjustment and assembly was designed. The highprecision measuring probes was used to measure the position of the inner and outer surfaces of the turbine shaft and the shaft disk.Through the principle of space geometry and coordinate transformation, the attitudes of the turbine shaft and the shaft disk were adjusted respectively to ensure that the shaft disk of the turbine shaft and the shaft disk of the shaft disk were in the same plane, and the shaft center of the turboshaft and the shaft center of the shaft disk were collinear. Aiming at the errors existing in the measurement process, the servo parameters of the motion axis in the assembly process were fed back to the PC terminal in real time, and the PC terminal and the controller were fully closed loop to realize the position detection and adjustment in the assembly process; after the docking assembly was completed, the highprecision sensor was used to measure the docking point of the turbine shaft and the shaft disk, and the value was compared with the target value to ensure assembly accuracy.The measurement, attitude adjustment and assembly process were verified through experiments, and the assembly gap value was less than 2 mm. The test results show that the measurement accuracy of the surface position of the turbine shaft and the shaft disk is high, the stability of the butt assembly process is strong, and the measurement assembly accuracy meets the actual requirements. The system has certain application value.