The invention provides a 2D/3D (two-dimensional/three-dimensional) switching type stereoscopic display and a control method thereof. The 2D/3D switching type stereoscopic display comprises a display panel, a polarization rotator and a lens component, wherein the display panel is used for providing an image with polarization direction; the polarization rotator is used for rotating the polarization direction of the image so as to lead the 2D/3D switching type stereoscopic display to be switched between a 2D display state and a 3D display state; the lens component is provided with a first direction and a second direction which are mutually vertical; and in theory, the lens component generates a non-lens effect for the images with the polarization directions positioned in the first direction, and generates a lens effect for the images with the polarization directions positioned in the second direction. The polarization rotator is configured to lead the polarization direction and the first direction or the second direction to form an included angle less than 45 degrees. By adopting the method, the mismatch of refractive index of the lens component in the 2D display state or the distance mismatch between the display panel and the lens component in the 3D display state can be effectively compensated, so that the display effect can be improved.