Focusing on the remarkable influence of wing flexure on transfer alignment(TA), a two-laser ranging method was presented to measure the wing flexure of missile-borne strapdown inertial navigation system(SINS) in different hook. An AR(��n��) model was put forward to simplify the ARMA(��p,q��) model to perform online modeling of wing flexure. In the modeling process, the recursive least squares algorithm was adopted to estimate the model parameters and ��F�� testing method using modeling estimation errors was applied to determine the rank of AR(��n��) model. Finally, the TA filter embracing multi-rank colored measurement noises was designed according to the online wing flexure model and rapid TA matching plan. Simulation experiments and results validate the feasibility and the validity of the online modeling method of wing flexure and the transfer alignment filter considering colored measurement noises, which provides an effective rapid and accurate TA method.