The invention discloses a vehicle image splicing method including that an original environment image is acquired by a vehicle camera, the splicing area corresponding to the original environment image is queried in a target image, and furthermore, a direction gradient graph is constructed based on the relevance between the original environment image and the splicing area; the direction gradient graph is subjected to regularization processing to obtain a common feature space, and furthermore, an energy function of the common feature space is constructed based on the relevance of the similarity distance measurement and the common feature space; and an optimal solution for enabling the value of the energy function to minimum is obtained and is taken as the final pixel value of the original environment image, and furthermore, the display is carried out after the final pixel value is assigned to the splicing area. According to the vehicle image splicing method, the computational complexity is reduced, the computational speed is improved, and the problem that the distortion rate of the spliced image is lowered because the matching of the image matching feature points is low can be prevented.