As a new type of waveguide coupling element, the liquid crystal polarization volume grating has attracted much attention because of its wide angular response bandwidth and unique polarization characteristics. However, the current research on liquid crystal polarization volume gratings is still in the initial stage, and the waveguide display system based on liquid crystal polarization volume gratings has the disadvantage of small pupil range. A liquid crystal polarization volume grating with a central wavelength of 532 nm and a reflection diffraction angle of 50° at vertical incidence is fabricated. The peak diffraction efficiency of the grating reaches 75%. Using it as the coupling element of the waveguide display system, the image transmission and display can be realized. At the same time, the expansion of the exit pupil in one-dimensional and two-dimensional directions is designed and realized, and the exit pupil is expanded to the range of 14 mm×12 mm.