The invention relates to a electric control device for beam translation based on Goos-Hanchen shift effect and a method thereof, and belongs to the technical field of laser control. A bottom surface of a prism and a lower surface of a lithium niobate wafer of an electro optic material are respectively plated with metal films, and the bottom surface of the prism and the surface of the lithium niobate wafer are adjusted to parallel and fixed by a metal bracket so as to form a wave guide double surfaces of which are clad by metal; and the wave guide is composed of an upper metal film, an air gap, the lithium niobate wafer and a lower metal film. When laser is emitted on the surface of the wave guide, the laser is coupled into a wave guiding layer to excite lateral shift of guided-mode resonance enhanced reflected light when a phase matching condition is satisfied. The upper metal film and the lower metal film are plated with electrodes and connected with an external DC voltage source, and the voltage is adjusted; parameters of the wave guiding layer are changed by electro optic effect and piezoelectric effect of the lithium niobate, which causes Goos-Hanchen shift change of the reflected light and further realizes control on the beam translation. The electric control device and the method thereof can achieve high stability and high precision of the beam translation control, and can be applied to general environments.