The invention discloses a large-angle light beam deflection implementation device and a deflection method thereof based on a liquid crystal optical phased array, which belong to the technical field of interleaving of liquid crystal optics, applied optics and diffraction optics, aim at implementing large-angle light beam deflection by generating an eccentric liquid crystal lens or a liquid crystal lens array through the liquid crystal phased array, and have the characteristics of having no mechanical inertia and having programmable control. In the device and the method provided by the invention, the large-angle non-mechanical inertia and programmable control light beam deflection is implemented through a light beam scanning device composed of the eccentric liquid crystal lens or the liquid crystal lens array generated by the liquid crystal optical phased array; the non-mechanical inertia and programmable control large-angle light beam deflection technology is implemented through the liquid crystal optical phased array, the technology is used for implementing the large-angle light beam deflection by forming the eccentric liquid crystal lens or the liquid crystal lens array according to the characteristics of the liquid crystal optical phased array, and the phase distribution of each liquid crystal optical phased array is controlled through programming to generate an eccentricity necessary for the light beam deflection so as to implement an expected light beam direction.