Augmented reality head-up display device and transportation device

The invention relates to an augmented reality head-up display device and a transportation device. The augmented reality head-up display device comprises a liquid crystal display structure used for emitting polarized light; and an light path structure which is used for being arranged between the liquid crystal display structure and the polarization structure and enabling the polarized light to be incident into the polarization structure by adjusting the light path of the polarized light. According to the augmented reality head-up display device, the polarized light emitted by the liquid crystal display structure cannot be directly identified, on one hand, privacy is improved, and other people cannot know the display content of the liquid crystal display structure on the premise that no polarization structure exists; on the other hand, the user does not need to distract to control the mobile terminal only through polarization structure identification, and potential safety hazards caused by falling of the mobile