In the static test, the deformation of wing with high-aspect-ratio will increase with loading level increment and the normal force direction of the wing will change at the same time. Taking the wing as the research object and considering the nonlinear deformation of feature, this paper proposes a kind of tracking loading technology in order to improve the accuracy of the wing's normal force under the condition of large deformation. With the deformation of the wing, the direction of the actuator's normal force is adjusted to ensure that the loading is always in the normal direction. The verification test is designed to validate the tracking loading technology in the end. The results show that the tracking loading technology can be used for the large deformation wing under normal force, which provides a new method for the wing static test.