Abstract: In order to solve the problem that laser 3D projection is unable to finish tasks with high precision, real-time and intelligent compensation positioning, a new method and accuracy analysis of intelligent laser 3D projection system based on laser tracking technology was proposed. Firstly, the mathematical model of the laser 3D projection system was established. Secondly, the laser 3D projection system was calibrated, and the coordinate system of the components was calibrated by using the datum points of the projection receiving component to complete the calibration of the intelligent 3D projection system. Finally, the model of intelligent laser 3D projection accuracy was established. Results of simulation showed that the middle part of projection area of laser 3D projector had the best accuracy. The projection point error of the projection surface caused by accuracy of the laser tracking measuring equipment was much smaller than the projection point error caused by the projector. The experiments results showed that the projection shape of the intelligent laser 3D projection system developed at the projection distance of 3 meters to 4 meters position accuracy could be better than 0.3 mm. Compared with the conventional laser projector, this system solved the problem that the large-size projection receiving part is unable to install the cooperation target in a large amount and the target reflex head and calibration tool were not needed in the follow-up work. The calibration process was omitted. When the projection system or the measured components moved or drifted, the intelligent recognition, solution, compensation for the relative displacement were completed to ensure accurate real-time projection to the correct location and greatly improved the integration, projection accuracy and positioning efficiency of the projection and positioning system.