The invention relates to a double-layer switchable three-dimensional liquid crystal display which comprises a time schedule controller, a microprocessor, a backlight module, a first liquid crystal panel, a controller and a second liquid crystal panel, wherein the time schedule controller is used for receiving an image signal and generating a left and right eye signal and a 2D/3D control signal; the microprocessor is used for outputting the image signal and outputting a control signal and a backlight control signal according to an output time schedule of the image signal; the first liquid crystal panel is used for receiving and displaying the image signal; the controller is used for outputting a voltage control signal according to the control signal; the second liquid crystal panel is used for rotating liquid crystal in the second liquid crystal panel according to the voltage control signal; and the time for rotating the liquid crystal in the second liquid crystal panel to a second angle is longer than the time for rotating the liquid crystal to a first angle.