A method for aligning liquid crystals is provided, and includes steps of providing a first substrate, forming a first electrode layer and a first alignment film on the first substrate; a second substrate, forming a second electrode layer and a second alignment film on the first substrate; forming a liquid crystal layer between the first alignment film and the second alignment film; providing an electrode plate and disposing the electrode plate on a side of the first substrate away from the first electrode layer; and applying a driving voltage between the electrode plate and the second electrode layer to align on the liquid crystal layer.