This paper presents a novel waveguide-based multi-channel metahologram that supports six independent and crosstalk-free holographic display channels. The metahologram is designed to multiplex the spin state and azimuthal angle of guided incident light within a glass waveguide, enabling the projection of six distinct images without crosstalk. The device employs a k-space translation strategy, allowing each target image to be selectively translated from the evanescent-wave region to the center of the propagation-wave region for free-space projection. By adjusting the encoded target images, the metahologram can also implement a three-channel polarization-independent metahologram and a two-channel full-color (RGB) metahologram. The number of multiplexing channels can be further increased by expanding the k-space's central-period region or combining the k-space translation strategy with other multiplexing techniques such as orbital angular momentum (OAM) multiplexing. The proposed metahologram offers enhanced imaging quality, expanded field of view, compact system size, and broad operational bandwidth, making it suitable for applications in AR/VR displays, image encryption, and information storage.This paper presents a novel waveguide-based multi-channel metahologram that supports six independent and crosstalk-free holographic display channels. The metahologram is designed to multiplex the spin state and azimuthal angle of guided incident light within a glass waveguide, enabling the projection of six distinct images without crosstalk. The device employs a k-space translation strategy, allowing each target image to be selectively translated from the evanescent-wave region to the center of the propagation-wave region for free-space projection. By adjusting the encoded target images, the metahologram can also implement a three-channel polarization-independent metahologram and a two-channel full-color (RGB) metahologram. The number of multiplexing channels can be further increased by expanding the k-space's central-period region or combining the k-space translation strategy with other multiplexing techniques such as orbital angular momentum (OAM) multiplexing. The proposed metahologram offers enhanced imaging quality, expanded field of view, compact system size, and broad operational bandwidth, making it suitable for applications in AR/VR displays, image encryption, and information storage.