The aim of this study was to decompose the hologram image into different frequency by Laplacian pyramid decomposition and embed the watermark into medium-high frequency coefficients of the residual image, so as to improve the invisibility of digital watermark. The second layer Laplacian residual image was obtained after multilayer Laplacian decomposition of Y components gray level image in the host image. Then the watermark was embedded into the second layer Laplacian residual image through the cosine transform. In the end, all the Laplacian residual images were rebuilt to a watermarked image. The experimental results indicated that the PSNR of the watermarked image can reach 40.3 dB with less noises in image details, at the same time, the watermarked image had good robustness against many attacks. The algorithm has better performance in improving the invisibility than before.