In this paper,a robust image alignment algorithm is presented for solving disorder sequential images′ mosaic problem.Firstly,input images′ multi-resolution pyramids are constructed,and phase-correlation sub area pairs are searched in the low resolution layer.Then,these area pairs′ SIFT feathers are cross-correlated to verify the matching situation,input images′ matching relation and each projective transformation matrix are initially estimated.Finally,the matched original images′ SIFT feathers are cross-correlated again for exactly solving the transformation parameters.Phase-correlation method and SIFT feather correlation method are combined in this algorithm,and the multi-resolution method is also applied.So,the velocity and stability of image alignment operation are optimized by this algorithm.