The work aims to propose a digital anti-arbitrary-angle-rotation holographic watermarking algorithm based on DWT transform and affine transformation, with respect to the poor robustness of the current digital watermarking in anti-rotation attack. Firstly, the encrypted hologram of the digital watermarking was done to ensure the watermark security. In combination with DWT transform, the watermark information was embedded in the carrier image. Then, the image angle was rectified based on the affine transformation, thus achieving the anti-arbitrary-angle-rotation attacks and other common attacks. After various attacks, especially the anti-arbitrary-angle-rotation attack, the watermark could still be effectively extracted. The NC value was greater than 0.6. The proposed algorithm is robust against the arbitrary angle rotation attack, and the watermark information can be effectively extracted from the watermarked image, which ensures the security and effectiveness of the watermark.