In response to the requirements for automatic positioning and scanning of component curved surfaces during aircraft assembly, relevant research was conducted using the Leica ATS600 laser tracker. Based on the SpatialAnalyzer (SA) software, secondary development was carried out using Measure Plan and SA SDK, and a research method for automatic positioning and scanning technology of laser trackers was proposed. The research process is as follows: first, connect the measurement equipment and import the curved surface digital model and theoretical positioning point information; then, measure the positioning features and curved surfaces; subsequently, perform digital model alignment and relationship matching between the actual measured information of the curved surface and the theoretical information, and automatically generate a report based on the matching results. Finally, a set of automatic positioning and scanning system for curved surface measurement was built, and a large-scale curved surface standard device was used as the experimental object for measurement. The results show that the program runs stably, effectively addresses the inherent shortcomings of SA, and significantly improves the efficiency and automation level of curved surface scanning.