Abstract: The need for high performance and security in modern optical information processing makes it increasingly important to integrate multiple holograms within a single optical component. However, integrating multiplexed channels—such as amplitude and phase—traditional single-layer metasurfaces has problems such as mutual interference between channels, and the design is difficult. In this paper, we propose a dual-channel phase-independent control method based on double-layer transmission metasurface structure. This approach enables pure phase-modulated holography without interfering with each other in the co-polarized and cross-polarized light fields. This is achieved by vertically stacking two nanopillars of identical unit cell size within a single pixel, allowing independent and combined control via the nanopillars. Through numerical simulation, it is realized that when the right-handed circularly polarized light (RCP) is incident, the transmitted left-handed circularly polarized light (LCP) and RCP adjust their respective phases to generate independent images. This method achieves accurate phase optimization, minimizes the interference between polarization channels, reduces design complexity, and improves image contrast and clarity on the basis of ensuring information density during hologram. This technology has great application potential in cutting-edge fields such as high-end optical imaging, all-optical computing, information security encryption, and 3D holographic display.