In order to get the rotation angle accurately and quickly by using the image registration, the Binary Robust Invariant Scalable Keypoints (BRISK) are improved. Firstly, we can get the origin key-points by BRISK, and set a threshold to the Hamming distance between the key-points to pick out the matching pairs. Afterwards, further screen the matching pairs by the minimum Hamming distance between them. Finally, combining the matching points respectively with OTSU, the affine matrix and feature points of the slope of the straight line the median value, the rotation angle and the time it costs are measured. Experiments show that the secondary hamming distance to get the matching pairs can improve the accuracy of the matching point, the error of rotation angle measured by these three methods is not more than 1 degree, and the time they cost is less than 1 second. Besides, it keeps certain robustness to noise, loss of outline, illumination variation and so on.