Abstract: In this paper, a method of GNSS dual-antenna attitude determination and the existing pose inconsistency which caused by installation error or other factors have been analyzed.At the same time, a point dynamic calibration method based on GNSS dualantenna and an experimental verification method have been proposed to solve the dynamic calibration of target points for difficult measurements directly through GNSS, and analyzing the point accuracy of dynamic calibration. The flight test example shows that the method can achieve dynamic calibration accuracy better than 3 cm, and provides a new solution for dynamic calibration of carrier target points.