With the increasing demand for information carrying capacity in modern soliety, a halftone holographic watermarking method based on dual channel 3D effect host image is proposed. The method based on dual channel technology combines two 3D host images of holographic watermark halftone into one image. Then, calculating hologram is produced, and a pair of calculating hologram can display two watermark images during reproduction. The resulting calculating hologram can increase the security and confidentiality of information transmission. Double channel technique can increase the amount of information. The process can improve the visual effect meanwhile keeping coding efficiency. The halftone coded holographic watermark can better improve the robustness of the holographic watermark.