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As an important part of license plate recognition, a lot of tilt and shear correction methods of license plate have been put forward. However, there are still some deficiencies. In order to improve the efficiency and accuracy of the tilt and shear correction methods of vehicle license plate, a series of improvement measures are put forward. First of all, special parts are extracted from the vehicle license plate to be used for horizontal tilt correction and vertical shear correction respectively. Then, according to the distribution rule of the projection variance, the angle with the maximum projection variance in the horizontal direction and vertical direction will be found respectively. These two angles are corresponding to the horizontal tilt angle and vertical shear angle of the vehicle license plate. In order to eliminate the influence of the structure of characters, the corresponding strategy is proposed. Experiments were conducted on 3000 real vehicle license plates in different situations. The experimental results show that not only the accuracy of the proposed method is slightly higher than the existing traditional methods, but also the efficiency has been greatly improved.