Abstract: As a common optical element in optical systems, polarization prism is widely used in many fields such as optical measurement, fiber optic communication, magneto-optical data storage, and light field regulation. It is the main way to acquire high-purity single linear polarization beams. In high-power continuous focusing-beam expansion systems, the introduction of polarization prisms usually has defects such as large device size, high replacement time cost, and lack of safety in separation methods. In this paper, based on the geometric phase matesurface regulation mechanism, polarization beam-splitting lens is constructed by mapping the lens phase into the spatial rotation angle of the etched nanograting in a single pixel point, and a quarter-wave plate is combined to achieve coaxial spatial separation of the orthogonal linearly polarized beam, with the transmittance ≥90%, and the extinction ratio of the two polarized beams at the focal area is 1∶0.003. This study provides new ideas for the diversified regulation of polarized beams in compact optical systems, and has certain reference significance for the innovative development of light field regulation and integrated polarized optical devices.