Liquid crystal phase shifter, preparation method thereof and electronic device

The invention discloses a liquid crystal phase shifter, a preparation method thereof and an electronic device. The liquid crystal phase shifter comprises at least one phase shifting unit. Each phase shifting unit comprises a first substrate, a second substrate and a liquid crystal layer arranged between the first substrate and the second substrate. A switch unit, a first electrode and a second electrode are arranged on one side, close to the liquid crystal layer, of the first substrate; the first electrode is electrically connected with the data line through the switch unit, and the second electrode is grounded; a supporting layer is arranged on the side, close to the liquid crystal layer, of the second substrate. By arranging the switch unit, the number of the phase shifting units through which the electromagnetic wave signal passes can be controlled, and the phase shifting quantity of the phase shifting units can be regulated and controlled. According to the liquid crystal phase shifter, the switch unit, the first electrode and the second electrode are all arranged on the first substrate, so that a film layer needing patterning treatment does not exist on the second substrate, it can be guaranteed that the box thickness of the liquid crystal phase shifter is uniform, and the accuracy of the phase shifting amount is guaranteed.