In order to achieve high-precision and high-efficiency measurements of the folding wing geometry of non-standard complex components， an automatic measurement method based on an improved Canny-FAST algorithm was proposed. This method addresses the challenges of low measurement accuracy， poor repeatability， and reduced efficiency associated with traditional manual measurement techniques. The Douglas-Peucker algorithm was integrated into the conventional Canny-FAST approach to enhance contour feature simplification， thereby improving extraction accuracy and robustness. An automatic measurement system for folding wing geometry was developed based on this method. By establishing seamless interactive communication between the measurement module and the motion module， measurement that is automatic， high-precision， stable， and efficient was realized. The performance of the self-developed automatic measurement system is verified， with length measurement accuracy exceeding 65 μm and angle measurement accuracy better than 0.049°， thus meeting the requirements for folding wing geometry assessments.